1993 Chevy Suburban Transmission

Asked by John195123 Nov 14, 2018 at 11:22 AM about the 1993 Chevrolet Suburban K1500 4WD

Question type: Maintenance & Repair

A little while ago I was driving home from out of town in my '93 Chevy Suburban (K1500 4wd). As I got off the expressway and approached home (fortunately) I found I was unable to accelerate past about 30mph (it won't change gears at that speed and will just rev with further pressing on the gas pedal). That was about 3 years ago. I've tried driving the truck around since then and the engine runs just fine, but it still won't get up past 30mph (not surprisingly).

The local garage we usually use wanted a few thousand dollars to replace the tranny, but that's not feasible right now (in medical school with no job).

I'm trying to figure out if there is something else I can do to diagnose and fix this transmission. I realize that rebuilding a transmission is hard, but I can do that if needed. I may just need to tear it apart and see what's going on inside, but I'm hoping there is a simpler cause.

Once I'm out of medical school and making money, I plan to rebuild the whole truck into a medical response vehicle for rural rescue, but for now I just need to be able to drive it and not have to pay to have it towed every time we have to move (which is getting costly).

Any thoughts would be greatly appreciated!

9,530

Mike answered 5 years ago

Will the engine free rev when it's in park and neutral in other words if you held the throttle wide open would the engine rev high enough to blow? If it won't rev past a certain point check the catalytic converter first, have you tried changing the fluid and filter?

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John195123 answered 5 years ago

Hi Mike, thanks for your reply! The engine will rev as high as I push it in neutral and park, so far as I know, but I'll get out and double check that. I probably should check/change the fluid and filter. I figured the mechanics (who we largely trust) would have suggested that when they checked it out if they thought it was the case, so I haven't checked it yet.

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John195123 answered 5 years ago

Just as an update, the engine will rev in park and in neutral and doesn't seem to be limited at all.

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Recon_11 answered 5 years ago

You get this fixed? I just bought a 2019 that did the same thing. They told me so far that the 1 l, 2 , 3 clutch housing is destroyed. That is all o know right now

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