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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Dec 2003 Posts: 1,061 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,061 | I have a 1990 2500 Chev. This my modern truck. The trans has started to whine as I accellerate so I expect something is wrong. This is a non overdrive trans. So my question is: Will a newer trans with overdrive just bolt in?
1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
| | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | Your 90 has basically a TH400. GM upgraded in 91 to the 4L80E (overdrive) which is electronic computer controlled. Perhaps someone offers a kit for the conversion. You might try Bowtie Overdrives. The 1500 series trucks used a 700R4 overdrive whch may also work with some possible differences in the tailshaft length, yoke, and u-joint.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | | | | Joined: Apr 2005 Posts: 32 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 32 | Well Mike, don't accelerate, then it won't whine. Maybe an SM420 would work well in there. With a little help from a drill, hot wrench, some off-set special application bolts, I'm sure you can make it work. I'm sure one of your "old truck" friends would help you. I'm not too busy right now.
Bill garvey
| | | | | Joined: Dec 2003 Posts: 1,061 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,061 | Thanks Fred, that sounds like more than I want to do to this truck, but I will check it out and see.
Bill, I still need to accelerate, so, I studied it a little and found that if I turn the radio way up loud, I don't hear it anymore. Problem solved!!
1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
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