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05-16-2010, 11:33 PM | #1 | |
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1996 chevy z71 transmission in limp home mode
I have a 1996 chevy z71 truck with a 4l60e transmission the transmission is in limp home mode it seems to work fine when i first drive it but when it warms up it takes off in 3rd gear i check the fluid fuses under the hood hook a scaner to it no transmission codes i can manuly shift throught all the gears with the scaner and they work fine i check the wireing to the trans and it looks good and the wireing going to the pcm i just put a used pcm from the junk yard i bought this truck a week ago and it didnt run when i bought it and now i got it running good and the trans is in limp mode someone please help me thanks
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05-17-2010, 09:24 AM | #2 | ||
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Re: 1996 chevy z71 transmission in limp home mode
Quote:
To check out transmission or get transmission codes you need a engine/transmission capable scanner. OBD11 sscanners or code readers will not do transmission problems. Post back any codes you get from a transmission capable scanner.
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Remember proper testing gives us the answer to many problems. MT |
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05-17-2010, 08:58 PM | #3 | |
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Re: 1996 chevy z71 transmission in limp home mode
I m not sure if the tranny was acting up before i changed the pcm i bought the truck not running with a bad fuel pump and the guy i bought it from was trying to fix the truck and put a pcm in the truck witch was the wrong pcm he put a v6 4.3 pcm in a v8 5.7 and the truck wouldnt run right so i changed the fuel pump and the the pcm now it runs great the scanner i have is a red snap-on scanner that reads transmissions and engine codes and does lots of tests but no codes come up for the tranny i m not even sure my tranny is even in limp mode
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05-18-2010, 07:42 AM | #4 | ||
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Re: 1996 chevy z71 transmission in limp home mode
Quote:
But should set code or codes. If you have the snap-on MT-2500 with 3 in 1 cartage or engine/transmission cartridge. Read out transmission shift and slippage data and shift time. Also make sure good fluid level and and fluid and filter. Any stuff in bottom of transmission pan?
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4l60e , chevy , transmisson , truck |
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