Qiken

Im looking at using a Dana 36 RPO G92, RPO G44 3.07 auto pumpkin (from an early 90's vette)to replace the current Dana 36 2.59 in my Auto 89.
Advise please
Can I use the rest of my current rear-end to complete the swap, and are there any foreseeable problem’s?
Updated speedo gear, number of teeth required?.

JD'S WHITE 93

Yes you can use everything else. This is a pretty straight forward nuts and bolts kinda job. You can either change the speedo gears or buy an electronic box to do it. The box is $$ the gears are cheap but require pulling the tailshaft off the trans. Since you will have the driveshaft out and the C-beam off anyways I would just change the gears. Central Coaster of CFI EFI or Pete K I'm sure will chime in with the CORRECT speedo gears. If you want more grunt this would be a great time to swap your stock converter too.

JD'S WHITE 93

https://www.corvetteforum.com/techti...=218&TopicID=2

This is a swap from the Dana 36 to a stronger Dana 44 but still lots of good info and pics.

Qiken

Thanks for the info,I have a trans go shift kit to install, so will do all at the same time.
Any suggestions on a replacement convertor.

JD'S WHITE 93

I don't know what stall to suggest for an L98 but the guy to talk to is Pete K. He's on the forum. I will send him a pm link to this thread.

brian84

I have a question for this thread, as im swapping in gears too, but to add to the spedo correction mix, : I just got some new wheels and tires, wich are larger than my old ones, I think stock tires were 255/50-16's and measured somewheres around 11.8 inches at a loaded tire radius, and my new wheels are 275/40-18's with a loaded tire radius at about 12.90 so how should I try and correct my spedo for that? my car is an 84 automatic

JD'S WHITE 93

I don't know but what you should do is start a new thread in C4 tech and you will get your answer. The black box will account for tire size I THINK.

rodj

www.700r4.com/speedoCalc/speedocalc.shtml

Will tell you what drive gear / driven gear you need

Casethecorvetteman

Just reuse your rear cover from your 2.59 diff and bolt it all back in

Pete K

Red drive gear
42 tooth driven gear
rotate speedo sensor 180 degrees

dan0617

Do you have to pull the tailshaft? I thought you could just pull the speedometer sensor or whatever it is called, then remove and change the driven gear for a swap from 2.59's to 3.07's. Is this correct??

Casethecorvetteman

I guess that would depend on which drive gear is allready in there Dan0617.