auto rear diff vs. manual rear diff

[ponykiller]

I took a 91 eclipse gsx auto awd car and put a 5 speed tranny in it. My question is are the ratios different or similar in the rear differentals between a 5 speed and an automatic?

Do i need to install a rear diff off of a 5 speed awd gsx?

[Toybreaker]

I believe the ratios are different from auto to manual.

You need the rear pumpkin and axles from a manual tranny car.

If'n you can't find one, I have a couple of three bolts that I'd let go cheapish..

But, if it was me I'd try and find a four bolt setup. They're stronger, and will hold up better to abuse...

[Mirage]

Auto and Manual rear diffs do have different ratios. You will need to swap it out.

I have a 3-bolt sitting here out of a '90 AWD. If you want it, $50 and it's yours.

Marcus

[sbiggi]

If you stay with the same axles that you currently have (3bolt vs 4bolt) all you need is the pumpkin. Rear axles for auto and manual are the same.