Hi everyone, I was wondering if someone can tell me how they made axles to fit the 4t80e Trans and our cars. I've tried the cadillac 4.9 inner tulips and shafts(which r the same length as the Beretta shafts)to the manual fiero outers and they are still to long.

I don't have an answer but maybe this will help even though he discusses the Northstar. His 4/19 edit seems to have the resolution.

quote I see a lot of guys runnin the 5 speed with the northstar, but I know there are plenty running the auto as well. Maybe Madcurl may be able to help me out here?? Now that I've finished my sister's 3800 NA swap, I'm looking for something to play around with in my spare time. I need to know what everyone is using for axles with this engine/trans combo. Edit 4/19/2010 Quote from Fiero STS and confirmed in posts below.. "First disassemble the caddy axles. Take the shaft to your machinist buddy and have him move the snap ring grooves as close to the center as the splines will allow. About 3/8 inch. Do this to both ends, all four snap ring grooves. Then cut off that much from the ends. This shortens the axles 3/4 inch. Next disassemble the outer joints, removing the balls and cage, save the center portion the part that fits the axle. Next disassemble Fiero manual transmission axle outer joints. Auto axles will not work, they are too small. Save the outer part with the axle stub that goes through the bearings and drives the wheels. Now put the part you saved from the Deville outer in the Fiero outer, using the balls and cage from the Fiero outer. Now you have an outer joint that fits your Fiero and fits on the Deville shaft. Now reassemble complete shaft. You should end up with a shaft that is 3/4 inch shorter with caddy tripod on inside and fiero c/v on the outside. "

I had to do some searching, but this is what I posted 12 years ago:
I need two 12" Berretta axles, and two tri-pots from a 4.9L Cadillac. This is the combination AJ used on his.

Bob

Are you sure that you can fit a 4T80e transmission and N* engine in the Fiero engine compartment? Its a huge transmission. Have you measured up?

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

quote Originally posted by Dennis LaGrua: Are you sure that you can fit a 4T80e transmission and N* engine in the Fiero engine compartment? Its a huge transmission. Have you measured up?

Yes...

Bob

I've tried the 12" Beretta axles and 4.9 tripods and they are still to long. Also I'm using the Trans behind a ls4

quote Originally posted by Billdavidson: I've tried the 12" Beretta axles and 4.9 tripods and they are still to long. Also I'm using the Trans behind a ls4

Can't say that I've used them on a 4T80e but Chevy Cavalier std axles are pretty short. I've used them on the 4T65eHD. check them out.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "