Question about 1993 GMC Sierra
Hi. I have a '93 Chevy Suburban that is on the 3rd transmission. What you probably have is the earlier 700R4 transmission. What you should have is the 4L60E. I have done ALOT of research on these transmissions, and what I've found out is this: the 4L60E is essentially the same as the 700R4, with the exception that the 4L60E is completely controlled by the vehicle's computer. The 700R4 uses a more antiquated valve body with a TV (throttle valve) cable. In theory, you could use the 700R4 if you connect the TV cable and properly adjust it. If it's a 4X4, your speed sensor is in the transfer case, so that wouldn't be an issue. The 4L60E used in '93 and '94 will only work in those model year vehicles, because of the type of shift solenoids used. The newer units used pulse width modulation solenoids, as opposed to the older on/off solenoids. I have run my truck with the transmission unplugged and the engine still runs fine. The major problem with using the earlier 700R4as opposed to the correct 4L60E, would be emissions compliance. If you want to discuss this further, email me at firstname.lastname@example.org
Posted on Nov 08, 2008
Although they may look identical, I believe you have purchased a 700R4, and your truck is equipped with the 4L60E. The transmission you have purchased will not interchange with the transmission you have in your truck. The transmission in your truck is electronically controlled, and the transmission you purchased is controlled via a governor and T.V. linkage (throttle valve). 93 was the last year for the 700R4, and the first year for the 4L60E. So you will want to find a 4L60E to put in your truck.
Posted on Apr 22, 2009
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Posted on Jan 02, 2017
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