84 GMC C20, granny-gear 4 speed to 88-98 5 speed swap? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tgredneck · 11-25-2010, 03:49 PM

Hey all, Happy Thanksgiving 2010!
I just bought a 1984 GMC C20 yesterday, and its got the granny-gear 4 speed in it. I also just found a 5 speed trans out of an 88 Chevy truck for sale for $50. I would like to do the swap, for better gas mileage.

my concerns are;
-how difficult would it be overall?
-could i use the same drive shaft and clutch setup? (84 still has manual clutch, not hydraulic as far as i know)
-any other problems i might run into?

Thanks!!

11-25-2010, 03:49 PM	#1
tgredneck Registered User Join Date: Nov 2008 Location: Kalamazoo, Michigan Posts: 7	84 GMC C20, granny-gear 4 speed to 88-98 5 speed swap? Hey all, Happy Thanksgiving 2010! I just bought a 1984 GMC C20 yesterday, and its got the granny-gear 4 speed in it. I also just found a 5 speed trans out of an 88 Chevy truck for sale for $50. I would like to do the swap, for better gas mileage. my concerns are; -how difficult would it be overall? -could i use the same drive shaft and clutch setup? (84 still has manual clutch, not hydraulic as far as i know) -any other problems i might run into? Thanks!! __________________ Daily Driver; 2002 Pontiac Grand Prix SE Project; 1972 Chevy C10 2wd Fleetside long bed 350/TH350 FOR SALE



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