| Author | Message | ||
| Bud Matthews Unregistered guest Posted From: 204.9.32.60 Rating: N/A |
Is repowering with a 6v92ta and keeping the spicer 4spd a good option? Are there lots of things that have to be changed? I know I'll have to change the radiator. I like the 4 spd fine I just would like to get hill climbing power. Appreciate anyones thoughts on the subject - Thanks Bud | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1007 Registered: 12-2000 Posted From: 71.195.113.23 Rating: N/A |
Bud - The real problem (besides heat) is torque. Look at your drivetrain in the 4104. It's Engine - Clutch - Transmission - Bevel Gears - Driveshaft - Rear Axle. When GMC was doing development work on the 8V71-powered V-drives, they kept blowing out the bevel gears, due to the higher torque output of the V-8 over the six. That's why they moved the bevels on the later model coaches, both sticks and autos. "New Look" transits and 4106s changed the stick drivetrain to: Engine - Clutch - Bevel Gears - Transmission - Driveshaft - Rear axle. In the automatic transits, the drive layout is: Engine - Bevel Gears - Torque Converter - Transmission - Driveshaft - Rear Axle. And, as has been mentioned elsewhere, this drivetrain layout change necessitated changing the pumpkin location on the rear axle - later models have it located on the curbside of the coach centerline. Not to say it can't be done, all it takes is $$$  OTOH, if you put a turbocharger on the 6-71, that would put you at about the same output as a stock 4106's 8V71, or roughly 275 hp. You still run the risk of the torque output overpowering the bevels, however, primarily in the lower gears. HTH. . . | ||
| Bob Ayers (Califbob)
Registered Member Username: Califbob Post Number: 4 Registered: 8-2006 Posted From: 4.243.221.126 Rating: N/A |
I have a turboed 671 ,4 valve head and all the latest stuff to up date a 671. Tons of power. It's got about 60k miles on it It's hooked upto a reuilt trans and diff. I'll sell it to you including the intire most beautifull 04 you have everseen for 20k |