WTB: transmission front main shaft bearings

Need a car part and don't know where to get it or how to install it. Look here!
User avatar
4wdEconoBox
Top Notch Member
Posts: 456
Joined: Sun Apr 05, 2015 6:56 pm
My tercel:: 1985 Toyota Tercel SR5 4WD
Location: Talladega, Alabama

WTB: transmission front main shaft bearings

Post by 4wdEconoBox » Wed May 16, 2018 7:55 am

My first gear started popping out a few months ago and has gotten worse and worse, I can't even used first gear anymore. So does anyone have a good pair of these bearings? I'm assuming it's only 2 of them...

User avatar
Petros
Highest Ranking Member
Posts: 10360
Joined: Sun Jan 28, 2007 6:31 pm
My tercel:: '84 Tercel4wd w/extensive mods
Location: Arlington WA USA

Re: WTB: transmission front main shaft bearings

Post by Petros » Wed May 16, 2018 5:10 pm

these bearings should still be available, they are generic bearings. I thought there was a thread on this topic, listing the bearing part numbers. But I could not find it. here is one on transmission seal part numbers:

viewtopic.php?f=16&t=11801

forum member Xirdneh know the part number for these bearings, he might even have some extras. perhaps he will chime in.
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)

User avatar
xirdneh
Highest Ranking Member
Posts: 1876
Joined: Thu Aug 04, 2005 11:38 am
My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
Location: seabeck, washington, USA

Re: WTB: transmission front main shaft bearings

Post by xirdneh » Wed May 16, 2018 11:30 pm

in "Repair Giudes" Title is "Transmission Notes"
1 800 409 3632 “Locate Ball Bearings” “Larry” for bearings B25-145 NSK (received NSK B25-145 C4 SDRS) $29.00, 32RT06S3LRN C3 NACHI $39.50 (LRN means groove and snap ring) KOYO, 6306NR $28.23, KOYO RNU070614 $59.00, All above + $9.95 shipping. 6306N from Amazon.com $27.50 (includes shipping and tax) 6306N has no shields but that’s OK.
KOYO RNU070614 available at Silverdale Transmission $17.50 (part #184) (thru alltransmission.com Portland Ore $29.25 1-800-345-7500) . See #4 & Special Note #18.

NR means it has a groove and snap ring.
N/O …..Not Available (Updated 04-04-2014)

3. Bearing on AFT end of Input Shaft is same as forward bearing on front end of Output Shaft 25BCS44JN NACHI N/O , B25-145 NSK , 6305x? .9845” ID x 2.479” OD x .689” Thk. Has groove for 2.375” ID x .066” Thk snap ring. 25mm x 63mm x 17.5mm. Toyota part No. 90363-25015 & 16. Snap ring 90520-59002 “Available” (Updated 04-08-2014)
3a. Bearing in aft end of Main Case for Output Shaft is KOYO 28NQ4020NRD 1.1012” ID x 1.573” OD x .7843 THK, 28mm x 40mm x 20mm. Has groove for snap ring. Toyota part No. 90369-28002 “Radial Cylindrical Roller” Available out of China only . (Updated 05-01-2014)
4. Input Shaft Roller Bearing info. This Bearing is inside the tyranny pressed into the Intermediate Plate. Approx 1.339” ID x 2.282”OD x .549” or .510” Thk.
It is located at the highest point in the tranny subject to wear first, if oil level is too low.
See Special Note #18.
KOYO RNU070614 Toyota part # 90365-34003 34mm 58mm 14mm recess .03mm
KOYO RNU0713 N/O 34mm 58mm 13mm .02mm
NSK VP34-2 N/O 90363-25025 34mm 58mm 14mm .03mm
NSK VP34-1 N/O 90365-34003 & 01 34mm 58mm 13mm .02mm
They all have a recess cut around one outside edge (53mm dia) and it is used for a retainer (12mm bolt and small plate) to lock bearing in place. The 14mm Thk bearing protrudes aft far enough for the large Idler Gear to make contact and that is probably why the 13mm Thk bearing is used. The Idler Gear is unlikely to hit the bearing because the angled teeth force the Gear aft away from the bearing. I have not seen any sign of interaction on trannys with 14mm bearing. KOYO RNU070614 “Available” (Updated 05-01-2014)

5. Bearing (roller) for forward end of Counter Shaft (pressed in Intermediate Plate) D8(or B)503004 NSK TORR N/O, KOYO BTM3021A. 1.1805” ID x 1.497” OD x .916” Thk. 30mm x 38mm x 23mm Toyota part No. 90364-30003 “Drawn Cup Needle” (Updated 04-08-2014)

5a. Bearing near middle of Countershaft 32RT06S3LRN C3 NACHI 1.252” ID x 2.362” OD x .785” Thk. 32mm x 60mm x 20mm Toyota part No. 90365-32009 “Available”
Tested while on shaft, extreme movement .007 for new .018 for worst (came out of white car that towed trailer, seems to have caused problems towing in 5th gear)
(Updated 10-10-2015)
5b. Bearing for aft end of Counter Shaft pressed in Transfer Case KOYO BTM1825A, IKO TA1825 ROLLER BEARING, NSK-RHP FJL-1825 ROLLER BEARING .706” ID x .985” OD x .98” THK. 18mm x 25mm x 25mm. “Drawn Cup Needle” “Available ““Toyota part No. 90364-18001.abt $21.00. Maybee BTM182520 would work? Available out of China only (Updated 05-01-2014)
5c. Bearing in aft end of TransAxle/Bell Housing for very front end of Counter Shaft is KOYO 20BTM2920 or DB501901, .765” ID x 1.141” OD x .7825” THK, 19.5mm x 29mm x 20mm. “Drawn Cup Needle” (Updated 04-29-2014)
6. Bearing on forward end of Idler Gear NACHI 6306NSL, NSK 6306N, NSK HR6306NX2, NSK 6306NR, GM 12334745, 2947761,907423, NISSAN 4321021050,43215A0150, RENAULT 23312714. 1.178” ID x 2.833” OD x .748 Thk. Toyota part No. 90363-30019 & 45. .Has groove for 2.625” ID x .066 Thk snap ring. 30mm x 72mm x 19mm. This bearing is “Widely Available” 6306NR the NR means it has a groove and snap ring. Bearing can be with or without shields. I clamped the bearing in a vise so the Idler shaft was pointing up and set a dial indicator at the highest point (on the side) and wiggled the top end of the shaft. The range of the worst moved .045” and the best .020” (new bearing .010”). The one that moved .038” came out of a tranny that had a bad input shaft bearing (the roller in tranny) and the good one out of a tranny with only 130,000 miles on it. When I held the good one in my hands and tried to feel the movement it was hardly noticeable but the worst one was very noticeable. (Updated 04-08-2014)
6a. Bearing for aft end of Idler Gear and pressed into Main Case KOYO BTM2520A, SKF HK2520, DAF 332532, SKF RHNA253220, KOMATSU 0612002520,1404313160, FAG DHK2520. .983” ID x 1.26” OD x .7833” THK, 25mm x 32mm x 20mm. Toyota part No. 90364-18001 (4wd), 90364-25002(2wd) these are probably the same. This bearing is common and “Available” “Drawn Cup Needle” (Updated 04-08-2014)
7. Bearing on forward end of Extention Housing Output Shaft NACHI 62/32 C4, NSK 62/32@2, NSK 62/32. “Available” 1.255” ID x 2.5575” OD x .6675” THK, 32mm x 65mm x 17mm. (Added 03-28-2014)
Love those Tercell 4x4 wagons but they sure suffer from road noise.

User avatar
xirdneh
Highest Ranking Member
Posts: 1876
Joined: Thu Aug 04, 2005 11:38 am
My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
Location: seabeck, washington, USA

Re: WTB: transmission front main shaft bearings

Post by xirdneh » Wed May 16, 2018 11:40 pm

three most common reasons that i have seen for popping out of first gear
1. Bad front output shaft bearing, causes output shaft to move fore and aft. (it is the same bearing as the one on aft end of input shaft)
2. The synchro meshing teeth worn out on first gear (not the gear teeth)
3. The Slider that moves over the synchro and 1st gear synchro meshing teeth thus connecting them together. its internal grooves are worn out
Love those Tercell 4x4 wagons but they sure suffer from road noise.

User avatar
4wdEconoBox
Top Notch Member
Posts: 456
Joined: Sun Apr 05, 2015 6:56 pm
My tercel:: 1985 Toyota Tercel SR5 4WD
Location: Talladega, Alabama

Re: WTB: transmission front main shaft bearings

Post by 4wdEconoBox » Sun May 20, 2018 11:45 pm

Ok, thank you guys so much! I haven't had a chance to really work on my car yet because it's my daily. But tomorrow I'm borrowing my uncles car for work so I should be able to pull the trans to start tearing it apart!

If it was the bearing would I hear a bad bearing noise like a whirring sound when the clutch pedal is pressed in?

If it was the syncro would it also cause problems with second gear? Because 2nd gear has always grinded? Ground? when I downshift....

User avatar
ARCHINSTL
Highest Ranking Member
Posts: 6270
Joined: Sat Apr 30, 2005 1:52 pm
My tercel:: Goldie is a 1986 SR5 attualmente con Weber/also owned the first T4WD in STL in late '82
Location: Kirkwood, a 'burb of St. Louis

Re: WTB: transmission front main shaft bearings

Post by ARCHINSTL » Mon May 21, 2018 3:40 am

Bless xirdheh's heart- this is now a "Sticky' and just MANY of his!
I just hope my Goldie never has need of this info*- she is at just 197K and should outlast moi.
Tom M.

*- Perhaps my motorhead nephew Matt in ATL (BMWs, Triumphs, and Landies) who will inherit my Goldie on my croaking will take heed.
Matt, bless his heart ...
T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."
T.S. Eliot - "The Love Song of J. Alfred Prufrock"
"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
Mark Twain

User avatar
xirdneh
Highest Ranking Member
Posts: 1876
Joined: Thu Aug 04, 2005 11:38 am
My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
Location: seabeck, washington, USA

Re: WTB: transmission front main shaft bearings

Post by xirdneh » Mon May 21, 2018 2:06 pm

4wdEconoBox wrote:
Sun May 20, 2018 11:45 pm

If it was the bearing would I hear a bad bearing noise like a whirring sound when the clutch pedal is pressed in?

If it was the syncro would it also cause problems with second gear? Because 2nd gear has always grinded? Ground? when I downshift....
I do not know what sounds might be made as i have never driven tercel with bad front output shaft bearing.
I have driven some that had the bad syncho mesh teeth and bad slider.
2nd gear grinding i would guess worn syncho. Original style carb keeps revs up for better shifting (throttle positioner) If TP is not working or you have a Weber carb that will cause some noisy shifting.
Love those Tercell 4x4 wagons but they sure suffer from road noise.

User avatar
Petros
Highest Ranking Member
Posts: 10360
Joined: Sun Jan 28, 2007 6:31 pm
My tercel:: '84 Tercel4wd w/extensive mods
Location: Arlington WA USA

Re: WTB: transmission front main shaft bearings

Post by Petros » Mon May 21, 2018 5:08 pm

if the sycro is marginal, sometimes you can do an ATF flush (50/50 ATF and gear lube, driven for a few days, drain hot, refil with good gear lube) and it will clean out deposites and improve the performance of the shifting.

but if you have worn out and sloppy main bearings they should be replaced, new bearings will hold the main shaft in position better, which will keep it from popping out of gear, and make shifting more smooth.
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)

User avatar
4wdEconoBox
Top Notch Member
Posts: 456
Joined: Sun Apr 05, 2015 6:56 pm
My tercel:: 1985 Toyota Tercel SR5 4WD
Location: Talladega, Alabama

Re: WTB: transmission front main shaft bearings

Post by 4wdEconoBox » Sat May 26, 2018 10:28 am

I really need to do the ATF flush, I just haven't had the time honestly. I'd be more than willing to bet that it's the main bearings starting to fail. My car has over 300,000 miles on it and for the past 8 years while it's been in my possession, its had regular gear oil changes, but I can't speak about its prior history and I do drive the car pretty hard.

I'm sorry in advance for being so dense, but I'm completely lost when it comes to finding out how/where to order the new main bearings.... If anyone could walk me through the best way that'd be appreciated, because when I look at xirdneh's detailed post it just confuses me past the point of no return honestly...haha

I figure while I replace the main bearings it'd be a good time to replace the 1-2 gear synchro too, I know you can't find these new, but does anyone of y'all perhaps have a decent used one that you'd want to sell me?

I'm also going to replace the clutch and pressure plate when I pull the tranny, since its been giving me issues...

User avatar
xirdneh
Highest Ranking Member
Posts: 1876
Joined: Thu Aug 04, 2005 11:38 am
My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
Location: seabeck, washington, USA

Re: WTB: transmission front main shaft bearings

Post by xirdneh » Sun May 27, 2018 5:37 pm

bearings noted "3.", "4." and "6." are the only ones i have ever seen go bad
so that's all i would replace
if you have noise when clutch pedal is up and it goes away when you push the pedal down that's "4."
if no noise i probably would not replace it.
Love those Tercell 4x4 wagons but they sure suffer from road noise.

Abra-Cadaver
Top Notch Member
Posts: 257
Joined: Wed Sep 11, 2013 5:29 pm
My tercel:: free ground-score: 1986 Tercel SR5

Re: WTB: transmission front main shaft bearings

Post by Abra-Cadaver » Wed May 30, 2018 10:25 am

you and I both. Xirdneh, you are the man. I'm still trying to get time to take mine out and fix. =(

User avatar
nontap
Newbie
Posts: 3
Joined: Mon Jun 11, 2018 4:39 pm
My tercel:: '86 4x4 waggon

Re: WTB: transmission front main shaft bearings

Post by nontap » Wed Jun 13, 2018 7:06 am

When 4th gear starts grinding, is the trans repairable or is the trans at the end of it's life. It doesn't go into 4th anymore, on overrun it can hold for a half a second. Cars over 300k on it.

User avatar
Petros
Highest Ranking Member
Posts: 10360
Joined: Sun Jan 28, 2007 6:31 pm
My tercel:: '84 Tercel4wd w/extensive mods
Location: Arlington WA USA

Re: WTB: transmission front main shaft bearings

Post by Petros » Wed Jun 13, 2018 1:35 pm

it is rebuildable if you can still drive it. if you drive it until it disintegrates, it all becomes scrap metal.

Either repair it soon, or you will have to replace it.
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)

User avatar
xirdneh
Highest Ranking Member
Posts: 1876
Joined: Thu Aug 04, 2005 11:38 am
My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
Location: seabeck, washington, USA

Re: WTB: transmission front main shaft bearings

Post by xirdneh » Thu Jun 14, 2018 12:05 am

on the 85-88 trannys they use a bolt instead of a roll pin to hold the shift fork to the shift shaft
i have taken a few of them apart where the bolt had come unscrewed and fell out of the 3rd/4th gear shift fork
the owners said they had gotten worse over time shifting into third and fourth until the screw fell out and shifting was not possible
Love those Tercell 4x4 wagons but they sure suffer from road noise.

User avatar
nontap
Newbie
Posts: 3
Joined: Mon Jun 11, 2018 4:39 pm
My tercel:: '86 4x4 waggon

Re: WTB: transmission front main shaft bearings

Post by nontap » Fri Jun 15, 2018 10:06 am

Thanks

Post Reply