1993 K1500 350 auto - 1/2 feel like they are slipping, OK in D... doesn't hold going downhill in 1/2

[rockymtnlover]

I'll start to search old threads too but any advice would be appreciated. I leave for hunting trip on Wed and this came up while out scouting today...

1/2 won't go up a hill... when on flat ground revs increase to 4-5K but vehicle speed might be only ~ 5-10 mph...

When going down a hill in 1 or 2 it feels the same as in D, no compression braking... I used to be able to put into 4L, 1 on a steep downhill and it would crawl...

Not sure if this might have something to do with it:

When doing some exhaust work I noticed a 3 wire plug on the driver's of the trans... 2 of the wires were burned / almost broken. I removed the connector and spliced the wires together with a solder connector... I'll inspect the connections but am wondering if I might have messed something up with the TC lockup??

 

[Schurkey]

Torque converter clutch has NOTHING to do with lack of engine braking in manual 1 and 2. Also has NOTHING to do with slipping in 1--2. Kinda surprised that it's OK in "D".

First Guess: Your trans is broken, it needs a complete rebuild, and you're not going to get it back from the shop by Wednesday. But I've been wrong before.

 

[stutaeng]

So basically it won't go into second is what I'm understanding based on OP's description?


If it's revving to 5k on flat ground and speed is 5-10 mph who cares what it does trying to go uphill, or downhill for that matter!!!???

Maybe the 2-4 band is burned up?

Sounds like truck needs to be taken to a good transmission shop or time for a rebuilt unit getting swapped by OP.