I don't know much about tranny's but I have been reading about the newer style 700's being better. I thought it was something about the 7 vanes pump and the location of the vanes. If the newer ones are better why can't you just take a pump out of a 4L60E. Are they different?

I told you it was dumb

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91 Z28 Camaro
305 TPI
Flowmaster 3" exhaust
700R4 with 2000 Stall and shift kit 3.42 rearend
Autometer shiftlight tach and B&M mega shifter
One sweet sounding system

 

There's other internal mods besides the pump that makes the newer (87 1/2 up) trannies stronger.

 

Two, dumber.
How do I tell if my tranny is the 87 1/2 model?
How do I upgrade internally to make it like a 1987 1/2 model for strength?

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Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

Hey how is the mod from 2.8 to 3.4 ??
i have a 2.8

 

Drop the 3.4 right in the 2.8's place. As for the tranny: it cannot be modded to completly match the newer ones. The case is different. Check this if you didn't already read it.
https://www.thirdgen.org/messgboard/...ML/003263.html

 

Joel,
You answer on the engines is NOT EXACTLY 100% correct.
Here is why.
YET, you are correct, in theory.
https://www.thirdgen.org/messgboard/...ML/001462.html

I've had my set up going for about 4 months now. I've coached about 12 people about this swap.

I can't wait to build a stronger tranny, hopefully soon & within my budget, too!!

Wish you could tell me how to get a great running tranny outta the wrecking yard for less money!
I keep trying to figure it out, instead of learning how to rebuild one of my tranny's.

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Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

Wow, I didn't think the 3.4 swap would be that involving besides swapping the short block and heads on and fixing it with some more fuel through higher pressures/new prom work. Good write-up!

 

Joel,
I love this swap SO MUCH!
It is such a joy to drive.
I have the F41 Suspension package, all the stuff behind the front bumper removed (to lighten by about 100-200lbs), it corners like a rail. As great as my 1974 Corvette.

If you have the chance, I highly recommend it.

This is why I need a stronger tranny.
I can change lanes sideways.
I can leave 50 foot one leggers.
This weak fresh rebuilt tranny, now in the Firebird, can go behind my 211,500 S-10 Blazer engine. This Firebird gets a fresh rebuilt Hi Po tranny and poly mount!

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Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA