Transmission question 1993 GMC Sierra ext. cab - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Razr · 10-16-2010, 07:29 PM

I have a 1993 GMC Sierra Ext. Cab c1500 350 5.7 and i am experiencing shifting problems

Does anyone know what transmission it has i was told it was the 4L60 but also have heard its the a 4L60E? please help thanks

**bwood** · 10-16-2010, 07:59 PM

Quote:

Originally Posted by Razr

Does anyone know what transmission it has i was told it was the 4L60 but also have heard its the a 4L60E? please help thanks

I believe it is a 4L60E. Look on the trans and see if it has handful of wires plugged into it the side, that would be a "E". There will be one plug on the back of both for the speed sensor, but the 700R4/4L60 will have just on plug on the side for the TCC. What are you shifting issues?

ChevyTech · 10-17-2010, 10:05 AM

May understanding is, all the automatics in 1993 C1500s were 4L60E transmissions.

clinebarger · 10-17-2010, 06:52 PM

93 was the first year for the 4L60E. Only C/K 1500 & LD C2500s got them that year. 93 RWD cars (Corvette, F-body, B-body) still used the 4L60 (700R4)

windyhill1910 · 10-18-2010, 11:04 AM

I have a 1994 4L60E with trans issues also, how big of a deal is it to put a 700R4 into it as I have a spare one of them ?

timcrow00 · 10-18-2010, 08:36 PM

i have a 93k2500 and it is a 4l60e, since its electronic your best bet is to take it to a shop and let them hook it to the computer. its usually free and they will drive it and read the codes and give you better feedback than anything we can do over the internet.

Razr · 10-19-2010, 02:35 PM

Well when i put it in gear to take it off 1st and 2nd gear have trouble shifting. When going to 2nd gear the RPMS raise up really high and the engine revs up really high before it shirts and 2nd gear has the same problem. however shifting to 3rd and fourth gear theirs no problem.

timcrow00 · 10-19-2010, 03:54 PM

if its slipping at all is most likely needs rebuilt, if it just revs up high before shifting it might be a selonoid. if it is a selonoid gone bad you will prolly have a check engine light on. either way a trip to a trans shop is your best bet. alteast to diagnose the problem

10-16-2010, 07:29 PM	#1
Razr Registered User Join Date: Jan 2008 Location: Hawthorne,CA Posts: 114	Transmission question 1993 GMC Sierra ext. cab I have a 1993 GMC Sierra Ext. Cab c1500 350 5.7 and i am experiencing shifting problems Does anyone know what transmission it has i was told it was the 4L60 but also have heard its the a 4L60E? please help thanks

10-17-2010, 10:05 AM	#3
ChevyTech Registered User Join Date: May 2004 Location: Minnesota Posts: 4,621	Re: Transmission question 1993 GMC Sierra ext. cab May understanding is, all the automatics in 1993 C1500s were 4L60E transmissions. __________________ For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too.

10-17-2010, 06:52 PM	#4
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Transmission question 1993 GMC Sierra ext. cab 93 was the first year for the 4L60E. Only C/K 1500 & LD C2500s got them that year. 93 RWD cars (Corvette, F-body, B-body) still used the 4L60 (700R4)

10-18-2010, 11:04 AM	#5
windyhill1910 Registered User Join Date: Nov 2009 Location: Grande Prairie, Alberta, Canada Posts: 21	Re: Transmission question 1993 GMC Sierra ext. cab I have a 1994 4L60E with trans issues also, how big of a deal is it to put a 700R4 into it as I have a spare one of them ?

10-18-2010, 08:36 PM	#6
timcrow00 Registered User Join Date: Mar 2009 Location: mulvane, KS Posts: 200	Re: Transmission question 1993 GMC Sierra ext. cab i have a 93k2500 and it is a 4l60e, since its electronic your best bet is to take it to a shop and let them hook it to the computer. its usually free and they will drive it and read the codes and give you better feedback than anything we can do over the internet.

10-19-2010, 02:35 PM	#7
Razr Registered User Join Date: Jan 2008 Location: Hawthorne,CA Posts: 114	Re: Transmission question 1993 GMC Sierra ext. cab Well when i put it in gear to take it off 1st and 2nd gear have trouble shifting. When going to 2nd gear the RPMS raise up really high and the engine revs up really high before it shirts and 2nd gear has the same problem. however shifting to 3rd and fourth gear theirs no problem.

10-19-2010, 03:54 PM	#8
timcrow00 Registered User Join Date: Mar 2009 Location: mulvane, KS Posts: 200	Re: Transmission question 1993 GMC Sierra ext. cab if its slipping at all is most likely needs rebuilt, if it just revs up high before shifting it might be a selonoid. if it is a selonoid gone bad you will prolly have a check engine light on. either way a trip to a trans shop is your best bet. alteast to diagnose the problem



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