Want to know what type of transmission is in my truck
I have a 1992 K1500 Silverado 4X4 with an auto trans with O/D. The truck is only a parts truck now and I have a chance to sell it but the buyer needs a transmission that has a round electrical plug on the rear of the tranny, mine has a square connector. I was under the impression that if there was an electrical connector then it was a 4L60E (electronic shift) and if there wasn't a cable then it's a hydraulic shift unit. What is the difference between a round electrical connector and a square one?
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I don't know. But I do know that any well run auto parts yard has interchange books for exactly this kind of question. Basically, any standard transmission can be made to work if you are willing to spend enough time and money. It is usually best and cheapest to stay with the factory trans.
Yes, the current ECM you have is calibrated for an automatic transmission. The PROM will not recognize the manual transmission. You will want to change the engine harness and ECM. There will be a number of things you are going to want to look into before starting. Good luck. Regards,
I don't see you did anything wrong per your description.
With the engine off, check the level of the transmission oil, replace the dipstick, start the truck and recheck the fluid level, level should drop. This will indicate the front pump is working.
Next, with truck running, put transmission into any gear, then return to park position. Do you hear any ratcheting noise.