converter?

[daustin]

Hi ya'll, i'm slowly working to get my "new" '93 3500 in shape.
When i start to move out from a stop, the motor revs to about 1500 rpm
before the truck starts to move. What rev's do other trucks start to move
out at? Mine's a '93 3500, 4L80E 6.5 TD. The reason i'm asking is my '93 GMC 5.7 moves out at about 1000 rpm. (i know comparing a gasser to a TD may not be valid) I've had a trans problem with a solinoid on the 3500, thus my question. I'd appreciate any info ya'll.

Don

[_Fox_]

The 96 1500 I drive starts to move at around the low 750's to 800 RPM. I'm not towing anything either.

[Chevylover]

Mine is a 95 K2500 4L80E and it begins to move on a flat surface even after i lift my foot from the brake. So it starts movin right at idle about 650 rpm.

Cu,
Sven

[_Fox_]

Well, if you want to count that, mine will do it too:D

[sixnickel]

If this truck has been sitting for a while could you have stuck calipers ????? And it needs that to over power them.

[daustin]

I checked the brakes, rotors..etc. When i lift the foot off the brake, it will "creep" forward. But if im trying to pull out normally, no load and on level ground it dosen't seem to hookup until i hit around 1500-1600 RPM. The previous owner had the trans rebuilt about 18 months before i got it, i'm
suspecting they may have used a gasser converter instead of the proper diesel converter. Or it may just be a bad converter. Right after i got it it would shift 1,2,3 just fine but after about 10 minutes it wouldn't go into 4th or lockup the converter. I replaced every electronic component in the tranny, seemes to work fine except for the higher than normal stall. Before i replaced the solinoids..etc it had a few trouble codes, stuck 2-3 solinoid, TCC unable to lockup, and Unknown ratio. I would think it should "stall" or hookup below 1000 rpm's, i have a '93 gasser with the 350 (1500 series) and it stalls/moves out at about 1100 rpm. Any info is greatly appreciated, thanks guys.
Don

[Husker 6.5]

I checked the brakes, rotors..etc. When i lift the foot off the brake, it will "creep" forward. But if im trying to pull out normally, no load and on level ground it dosen't seem to hookup until i hit around 1500-1600 RPM. The previous owner had the trans rebuilt about 18 months before i got it, i'm
suspecting they may have used a gasser converter instead of the proper diesel converter. Or it may just be a bad converter. Right after i got it it would shift 1,2,3 just fine but after about 10 minutes it wouldn't go into 4th or lockup the converter. I replaced every electronic component in the tranny, seemes to work fine except for the higher than normal stall. Before i replaced the solinoids..etc it had a few trouble codes, stuck 2-3 solinoid, TCC unable to lockup, and Unknown ratio. I would think it should "stall" or hookup below 1000 rpm's, i have a '93 gasser with the 350 (1500 series) and it stalls/moves out at about 1100 rpm. Any info is greatly appreciated, thanks guys.
Don
TCC not locking up is a big indicator that you most certainly have problems with the converter, if the ECM, harnesses, and connectors check out OK. From what you described having to replace following the previous "rebuild", it sounds like a "rattle can" rebuild (just spray it with degreaser, hose it off, and Voila! It's rebuilt!) What did the inside of the tranny look like, clutches, steels, etc? Have you tested the line pressures to ensure the pump is ok? The stock diesel converter was adequate for a stock 6.5, but mod the engine and it quickly is incapable of dealing with the extra torque when locked up as the clutch is just too whimpy. (See the thread on slipping when showing off with black smoke, above.) If the rest of the tranny checks out OK, then drop it and install an AFTERMARKET multi-clutch converter. TCI, B&M, and TCS all make good multi-clutch lock-up converters that can safely handle 800+ lb/ft of torque, plus they will lower the stall speed from stock to make better use of the torque band of the engine. (Frankly, I'm suprised that Walt hasn't offered an aftermarket converter, as a good multi-clutch will do more to reduce high trans temps due to slippage than a deep pan will alone if you've fully modded a 6.5.) A multi-clutch converter is going to be my first major purchase after I get my motor back together to handle the 600+ lb/ft my 6.5 will be making.

Worst case scenario, you'll have to start over at square one and have a competent, reliable rebuild done on the tranny, and use an aftermarket multi-clutch converter.

Hope this helps.

Husker 6.5:)

P.S. Hey, is this the same tranny that you put all new solenoids and an integral temp sensor harness off e-bay that you were talking about back on 4/12?