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sc3800 swap questions by atcrider1
Started on: 08-12-2014 02:32 PM
Replies: 5 (199 views)
Last post by: Lou6t4gto on 08-13-2014 01:52 PM
atcrider1
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Report this Post08-12-2014 02:32 PM Click Here to See the Profile for atcrider1Click Here to Email atcrider1Send a Private Message to atcrider1Edit/Delete MessageReply w/QuoteDirect Link to This Post
what are you guys using for the front motor mount? anyone using the th125 with a 3.8?
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Dennis LaGrua
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Report this Post08-12-2014 09:03 PM Click Here to See the Profile for Dennis LaGruaClick Here to Email Dennis LaGruaSend a Private Message to Dennis LaGruaEdit/Delete MessageReply w/QuoteDirect Link to This Post
Using WCF mount and bracket. If you plan on running a 3800SC through a TH-125H it better be properly built with a longer clutch pack w high performance discs, a shift kit, some heavier internal parts and a built high stall speed torque converter. A worn TH-125H won't last long behind a 3800SC engine.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

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phonedawgz
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Report this Post08-12-2014 09:08 PM Click Here to See the Profile for phonedawgzClick Here to visit phonedawgz's HomePageClick Here to Email phonedawgzSend a Private Message to phonedawgzEdit/Delete MessageReply w/QuoteDirect Link to This Post
There is no good reason to use the TH125C behind a 3800 SC.

You will get better mileage with the 4T65E-HD.
You will get better performance with the 4T65E-HD.
You will get better dependability with the 4T65E-HD.
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86soon3.4
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Report this Post08-12-2014 09:11 PM Click Here to See the Profile for 86soon3.4Send a Private Message to 86soon3.4Edit/Delete MessageReply w/QuoteDirect Link to This Post
what he said ^


I made my own front mount bracket.


Steve

[This message has been edited by 86soon3.4 (edited 08-12-2014).]

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AutoMarshal
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Report this Post08-13-2014 12:11 AM Click Here to See the Profile for AutoMarshalClick Here to visit AutoMarshal's HomePageSend a Private Message to AutoMarshalEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Dennis LaGrua:

Using WCF mount and bracket. If you plan on running a 3800SC through a TH-125H it better be properly built with a longer clutch pack w high performance discs, a shift kit, some heavier internal parts and a built high stall speed torque converter. A worn TH-125H won't last long behind a 3800SC engine.



"A worn TH-125H won't last long behind a 3800SC engine".... a thousand $ later..... a built TH125 wont last either.

^^^^^^ what they said ^^^^^^


Maybe 86soon will start producing a nice front engine mount that bolts to both sides made of 1/4" steel for the 84-87???????
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Lou6t4gto
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Report this Post08-13-2014 01:52 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
Do Not use the 125 with a 3800. it Will Not" take it", the MPG will be terrible. the 4t65e HD is cheap, and can be rebuilt for less than $200, (It's very easy, I did it, and I never rebuilt an automatic trans before) just get a DVD and a $150 Rebuild KIT. The "Special tools" amounted to a coat hanger and a piece if Threaded rod !)the only Extra part you SHOULD get is a" hardened 4th gear clutch shaft", they wear out in all the older trans. you have to make a wire harness, so wire it for the 4t65e trans. as for the front engine mount, you CAN use the orig fiero mount, but it is WAY advisable to use the setup (Don't recall Who Makes it) that uses 1 mount on" each side" (2) of the front of the engine. not 1.
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