engine swap - FWD 5-speed engine into auto trans

How-to's and repair secrets for your 4WD can be found here. Have a question? Ask it in here!
Post Reply
tercle
Top Notch Member
Posts: 222
Joined: Sat Aug 27, 2011 9:57 am
My tercel:: 1985 SR5
Location: Seattle

engine swap - FWD 5-speed engine into auto trans

Post by tercle »

I want to swap the engine from an 86 FWD 5-speed wagon to an 86 FWD auto wagon.

I got two wagons.
The stick wagon is stuck in 2nd, but has a strong engine.
The automatic has a weak engine that burns oil, but the transmission is easier on my bad knees.

What are the differences between an 86 standard transmission engine and an 86 auto transmission engine?
What do I need to swap onto the engine going into the automatic car?

I know the 3AC automatic wagon is under-powered and all, but I still want to do it.
User avatar
Petros
Highest Ranking Member
Posts: 11941
Joined: Sun Jan 28, 2007 6:31 pm
My tercel:: '84 Tercel4wd w/extensive mods
Location: Arlington WA USA

Re: engine swap - FWD 5-speed engine into auto trans

Post by Petros »

I do not think there are any issues, internally the engine is identical, I think it even uses the same cam shaft. You will have to remove the flywheel from the manual trans engine, and the pilot bearing. And than install the backing plate from the auto trans where the flywheel goes. Since you have both cars you can swap over any other differences. There might be a kick-down linkage on the throttle plate, it what causes the auto trans to down shift when you stomp on the accelerator, but that too should be an easy swap over.
'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)
Post Reply