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Normal Topic TH400 VSS hook up same as a TH700R4? (Read 1387 times)
Tex
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TH400 VSS hook up same as a TH700R4?
Mar 6th, 2015 at 4:02am
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Hey Guys,

I have a stock 88 GMC C3500 It has the 7.4 TBI with a TH400 and the moonie gauges. I am in the process of installing a built TH700R4. Will the original VSS in the TH400 bolt into the 700R4? I am assuming they both have the 2 1/4" opening like the old gear driven cable types?

Sorry no SS but I did eventually find this cool old dually.
  

1988 GMC C3500 7.4 TH400
2004 Harley FXSTD Softail Deuce
2005 Chevy 2500HD 6.6
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Re: TH400 VSS hook up same as a TH700R4?
Reply #1 - Mar 6th, 2015 at 7:07am
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Looks to be the same part number in the books.
  

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Tex
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Re: TH400 VSS hook up same as a TH700R4?
Reply #2 - Mar 6th, 2015 at 7:35pm
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Thank You!
  

1988 GMC C3500 7.4 TH400
2004 Harley FXSTD Softail Deuce
2005 Chevy 2500HD 6.6
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Re: TH400 VSS hook up same as a TH700R4?
Reply #3 - Mar 12th, 2015 at 3:46am
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A built 700 works okay int he lighter half tons, but in that dually and if pulling any loads may be a problem for you.  They cannot handle the torque very well. Undecided
  


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1990 454SS Whipple charged 7 psi, Edelbrock Performer TBI intake, Edelbrock TES, Borla Cat back, heated O2, Eaton limited slip, 2/4 lowered, Gear Vendor Overdrive, Belltech Rear Sway Bar, 13.54 sec @ 100.02 1/4 mile
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Tex
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Re: TH400 VSS hook up same as a TH700R4?
Reply #4 - Mar 29th, 2015 at 2:06pm
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I hear you. I have a 2500HD Duramax that I use for any serious hauling. The Dually is more of a fix up project and cruiser than anything. I'll load the bed up from time to time. I don't really have any plans to pull anything with it.
  

1988 GMC C3500 7.4 TH400
2004 Harley FXSTD Softail Deuce
2005 Chevy 2500HD 6.6
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Re: TH400 VSS hook up same as a TH700R4?
Reply #5 - Feb 28th, 2019 at 8:10pm
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I've had the transmission in the truck for close to 2 years now.  Wound up putting a TCI constant pressure valve body in it and I use a B&M Controller for the lock up.  I've been really pretty happy with this set up so far.  But... if I had to do it all over again it would have to be a 4L80E set up.  At the end of the day it would wind up costing a little more (spent a lot more on the 700R4 setup than originally planned) and I would have a proper transmission in it.  Especially to handle the extra weight and or performance upgrades.
  

1988 GMC C3500 7.4 TH400
2004 Harley FXSTD Softail Deuce
2005 Chevy 2500HD 6.6
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Re: TH400 VSS hook up same as a TH700R4?
Reply #6 - Jul 5th, 2019 at 8:07pm
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That 700r4 must have been a well custom build unit far from stock at least. A constant pressure valve body was a wise thing to do.
  

Build# 394, 1991 496SS, 80MM remote midmount turbo,� Edelbrock injection, 4L80E + Gear Vendors.
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Re: TH400 VSS hook up same as a TH700R4?
Reply #7 - Jul 5th, 2019 at 8:08pm
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That 700r4 must have been a well custom build unit far from stock at least. A constant pressure valve body was a wise thing to do.
  

Build# 394, 1991 496SS, 80MM remote midmount turbo,� Edelbrock injection, 4L80E + Gear Vendors.
*VIDEO* https://youtu.be/bYEtA5vLx-w *VIDEO*
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