Aftermarket Overdrive.........???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

andrew king · 09-20-2004, 07:41 PM

Anyone know of a company like gear vendors that sells overdrive units to bolt on to the back of a transfer case?? or better yet anyone have one they want to selll??

AirMale · 09-20-2004, 07:53 PM

I have a gear vendors and it was $2200 but I think US gear makes one. There are some differences like the US gear you can't shift on over 35mph. I believe it is much less money though.

1969 GMC · 09-20-2004, 09:14 PM

Advance Adapters makes an overdrive unit called the Ranger III that bolts between the bellhousing and tranny for GM SM465's and other manual transmissions (no autos tho), so you could use it in either a 4wd or 2wd. It basically acts like a gear splitter, and will offer a 27% overdrive when engaged in 4th gear. Cost: $1300 new. I asked about them here and on Pirate4x4, and no one seems to have even heard of them, let alone them being used in a truck.

Blue Beard · 09-21-2004, 02:02 AM

Anyone know the website for Advance Adapters?

09-20-2004, 07:41 PM	#1
andrew king Registered User Join Date: Apr 2004 Location: Susanville CA, home of 6000 convicts lol Posts: 157	Aftermarket Overdrive.........???? Anyone know of a company like gear vendors that sells overdrive units to bolt on to the back of a transfer case?? or better yet anyone have one they want to selll??

09-20-2004, 07:53 PM	#2
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	I have a gear vendors and it was $2200 but I think US gear makes one. There are some differences like the US gear you can't shift on over 35mph. I believe it is much less money though. __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

09-20-2004, 09:14 PM	#3
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	Advance Adapters makes an overdrive unit called the Ranger III that bolts between the bellhousing and tranny for GM SM465's and other manual transmissions (no autos tho), so you could use it in either a 4wd or 2wd. It basically acts like a gear splitter, and will offer a 27% overdrive when engaged in 4th gear. Cost: $1300 new. I asked about them here and on Pirate4x4, and no one seems to have even heard of them, let alone them being used in a truck. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

09-21-2004, 02:02 AM	#4
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,831	Anyone know the website for Advance Adapters? __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo



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