Comments on: What's wrong with Ludwig's Van?

Question: What's wrong with Ludwig's Van?

ludwig_van — Thu, 01 Nov 2007 01:46:13 -0800

Help me figure out what's wrong with my old crappy van.

It's a 1992 Chevy conversion van (automatic transmission). The alternator and tensioner failed last week and I replaced them. I was driving it tonight and it was doing fine going 65 on the highway, but then when I exited it started getting stuck in a low gear and refusing to shift to the next one, so I couldn't accelerate past 20. But then it would work normally for a few minutes at a time before getting stuck again, and so on as I drove home.

Can you tell what could be wrong with it, and estimate how much it should cost to fix?

By: thomcatspike

thomcatspike — Thu, 01 Nov 2007 02:36:50 -0800

Did you check the transmission's fluid level? (the first thing to do)

By: caddis

caddis — Thu, 01 Nov 2007 04:36:36 -0800

It sounds like the bands are slipping in the tranny. It could just be low fluid or the screen in the tranny is clogging, but if it is not it is probably serious.

By: kuujjuarapik

kuujjuarapik — Thu, 01 Nov 2007 05:48:43 -0800

Definitely check the transmission fluid, and look for signs of metal in the old fluid. If you have high mileage, it could be time for a new transmission. This site looks like it could help you fix it yourself.

By: Brockles

Brockles — Thu, 01 Nov 2007 06:20:38 -0800

When it does shift, does it shift slowly? Like slurring?

That is another sign of low fluid (most likely cause if easily fixable).

By: neat-o

neat-o — Thu, 01 Nov 2007 06:33:42 -0800

You may have accidentally unhooked a crucial vacuum hose when you were replacing the other stuff. Older automatic transmissions got a lot of info about engine load via vacuum, and if one is open to atmosphere, the transmission is hopelessly confused. If it is just loose, that would explain the intermittent nature of the symptoms.

By: M.C. Lo-Carb!

M.C. Lo-Carb! — Thu, 01 Nov 2007 08:09:43 -0800

Seconding neat-o. Also, when you disconnected the electrical system to replace the alternator, you may have reset a computer that gives information to the transmission.

By: enobeet

enobeet — Thu, 01 Nov 2007 10:00:07 -0800

... and refusing to shift to the next one

It won't shift based on RPM's or when you manually shift between L-2-D etc?

By: ludwig_van

ludwig_van — Thu, 01 Nov 2007 18:41:15 -0800

I checked the fluid level, it looked good. I didn't do the alternator replacement myself. I drove it around this morning and it had no problems, so I'm going to cross my fingers and see if it happens again.

By: ludwig_van

ludwig_van — Sat, 03 Nov 2007 11:50:35 -0800

It started happening again, so we took it to a transmission place. They said it was low on fluid and the transmission is all messed up such that there is no third or fourth gear and the transmission needs to be rebuilt. I drove from San Diego to Las Vegas last night going 45 the whole way. It was a bummer.