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08-03-2006, 10:17 PM
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#1 |
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Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,448
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TH400 in place of TH350
What do I need to go from a TH350 (that's slipping) to a TH400 in my 70 swb? Can I use my drive shaft? Do I need the electric kick down switch? I was going to rebuild a 700R4 but found this TH400 free and based on my immediate plans for the truck (heavy pulling) decided to take this route!
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal.  We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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08-03-2006, 10:29 PM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: TH400 in place of TH350
you'll need a new yoke, drive shaft mods (or take the whole saft from another truck) You'll need to move your cross member back...(exhaust mods may be needed) You don't NEED the electric kick down... it won't kill the tranny like on an overdrive, but you'll probably want it.
I think that's about it... don't forget a new converter and to flush your cooler REAL good. |
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08-04-2006, 02:22 PM
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#3 |
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Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,448
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Re: TH400 in place of TH350
What is involved in modifying my driveshaft?
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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08-04-2006, 03:46 PM
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#4 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: TH400 in place of TH350
shortening it.
If for some odd reason you have a long shaft TH350, and you are going to a short shaft TH400 you'll need a longer shaft, but odds are you have a short TH350. (that's what's original in these rigs) Pluss the yoke chainge. |
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08-04-2006, 10:22 PM
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#5 |
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Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,448
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Re: TH400 in place of TH350
Sounds like a good time to get a one piece shaft.
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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08-04-2006, 11:59 PM
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#6 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: TH400 in place of TH350
agreed.
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