t-case grinding into 4low

[86chevyk20]

when this happened i just started the truck, it didnt run long and the choke was closed so i think my idel is way to high.. i know that will cause isseus

 

[HotRodPC]

Could be. I couldn't get mine in 4Low when the high idle was up about 1500 rpm or so. It was actually the PO trying to do it, and he thought the Tcase was bad too along with the trans and I think is why he accepted the $100 less offer. He wanted $600, he got $500. But after I fixed the auto choke, the Tcase worked fine.