Automatic trans shifting problem

Asked by May 06, 2014 at 08:14 PM about the Chevrolet Silverado 1500

Question type: General

I recently replaced my engine in my 94 1500 automatic 4x4 silverado. I had a good
running 88 350  basically the same as the original. It runs great but the problem is it try's
to shift too quick when I accelerate then it has to shift back down so back and fourth it
does that. I found out the 94 trans shifts by computer but the older 88 model didn't. I
didn't nt put the 94 manifold back on the 88 that I installed in my truck. So what can the
problem be and  how to solve it. My original engine with the correct manifold is gone so I
can't use that. I don't understand what sends the signal to the trans when to shift since it
doesn't have the same  linkage as the 88. I do notice there is another plug in in the
harness down close to where the main harness plugs into the transmission. Does
anybody have any advice. Thanks lots  Jim

1 Answer

19,505

the trans uses the TPS to control shifts as well as the speed sensor. The TPS should be on the throttle body

Your Answer

Chevrolet Silverado 1500 Experts

  • #1
    John Carson
    Reputation
    2,660
  • #2
    Rowefast
    Reputation
    2,000
  • #3
    Silverado_owner_2006
    Reputation
    1,710
View All

Related Models For Sale

Used GMC Sierra 1500
1,003 Great Deals out of 66,526 listings starting at $2,495
Used Ford F-150
2,519 Great Deals out of 193,860 listings starting at $799
Used Chevrolet Silverado 2500HD
314 Great Deals out of 29,873 listings starting at $3,500
Used Dodge Ram 1500
369 Great Deals out of 10,765 listings starting at $1,500
Used Toyota Tundra
482 Great Deals out of 33,133 listings starting at $2,000
Used Toyota Tacoma
589 Great Deals out of 43,856 listings starting at $2,200
Used Ram 1500
976 Great Deals out of 109,688 listings starting at $5,500
Used Chevrolet Tahoe
708 Great Deals out of 41,339 listings starting at $1,995
Used Chevrolet Colorado
269 Great Deals out of 33,734 listings starting at $1,900
Used Ford F-250 Super Duty
312 Great Deals out of 45,081 listings starting at $1,700
Used Chevrolet Camaro
409 Great Deals out of 30,592 listings starting at $2,495
Used Chevrolet Silverado 1500HD
7 Great Deals out of 260 listings starting at $2,195
Used Chevrolet Silverado 2500
5 Great Deals out of 221 listings starting at $2,888
Used Nissan Titan
211 Great Deals out of 20,495 listings starting at $3,695
Used GMC Sierra 2500HD
103 Great Deals out of 13,801 listings starting at $2,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.