I Have A 1991 Chevrolet Silverado 2500 With The 5.7Liter 350. It Has A 5-Speed Manual Transmission I Just Need To Know What Model It Is. Thanks

I Have A 1991 Chevrolet Silverado 2500 With The 5.7Liter 350. It Has A 5-Speed Manual Transmission I Just Need To Know What Model It Is. Thanks

Inside glove box is a list of options codes. Find all the start with an M?? and list them. That's the best way to know what is in there.

There were 2 models used, NV3500 & NV4500 according to my sources. NV - New Venture Gear

nv3500 is all aluminum and has integral bell housing

nv4500 is cast iron main case and has a separate bell housing


Also each has different fluid requirements.

hey just a question will a gas and diesel use the same transmission? i have a 6.5l diesel???? plz advise?

The NV4500LD was used in GM gas and diesel applications, and Dodge V8 gas applications. The bottom pic. The other NV3500 is a light duty transmission.

GM Light truck

General Motors used the NV4500 as RPO MT8 & MW3 in 8500 + GVWR light trucks.
1992–1994 GMC & Chevrolet C/K 2500 and 3500
1995–2002 GMC & Chevrolet C/K 2500 and 3500
2004–2006 Chevrolet Silverado 2500HD and 3500 and 2007 Silverado Classic
2004–2006 GMC Sierra 2500HD and 3500

So look for MT8 & MW3 on the option code label in the glove box.