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Thread: Official NBS 4.3v6 to GEN 3 V8 swap Guide

  1. 12-06-2009 08:36 PM #191
    Fadingglories
    Fadingglories is offline Junior Member
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    I am a newbie when it comes to auto transmissions but i have never heard of anyone shimming anything on the torque converter. My dad bought a built trans a couple of years ago and had problems from the second he installed it and thought it was him when it turned out that the tranny shop put it together wrong. In the end he ended up with a free install and a couple of free upgrades. Back to your shimming, From the little that i know i believe the torque converter just slides onto some splines and thats it.

    Mods: 5.3 swap / Built 4L60E / Built Transfer Case /Flowmaster super 44/ Cold Air Intake/ Custom tune/ Limited Slip Diff/ 10,000k HID's/ Electric Fans/ Dual Batteries/
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  2. 12-07-2009 09:19 AM #192
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    banker099
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    bell housing is the same, and ive never heard of shimming the TC
    ↓↓↓click pic to go to garage↓↓↓

    408, WCCHL92s, nelson tune,4L80e 3600 Circle D,
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  3. 12-07-2009 08:53 PM #193
    DennisG_02Silverado
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    thats what i thought.... i'm pulling the tranny back out tomorrow morning and taking it to the guy. he just started throwing these excuses at me prolly bc he hasnt had anyone to build a tranny thats done a swap like this.

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI
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  4. 12-21-2009 10:02 PM #194
    Fadingglories
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    Quote Originally Posted by DennisG_02Silverado View Post
    thats what i thought.... i'm pulling the tranny back out tomorrow morning and taking it to the guy. he just started throwing these excuses at me prolly bc he hasnt had anyone to build a tranny thats done a swap like this.
    How did your tranny work? I got mine back and got a smokin deal on it and it works great. I just wish i had put in a cam or a 6.0 now but thats another day perhaps...

    Mods: 5.3 swap / Built 4L60E / Built Transfer Case /Flowmaster super 44/ Cold Air Intake/ Custom tune/ Limited Slip Diff/ 10,000k HID's/ Electric Fans/ Dual Batteries/
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  5. 12-24-2009 07:56 PM #195
    DennisG_02Silverado
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    Quote Originally Posted by Fadingglories View Post
    How did your tranny work? I got mine back and got a smokin deal on it and it works great. I just wish i had put in a cam or a 6.0 now but thats another day perhaps...
    well i took it back out, and took them the tranny. turns out the pump was missing the teeth that the convertor hooked on. and the pump rotor was in 4 pieces, the race on outside of that was in three....

    Got it all back together and in truck, now i have 1500 miles on new rebuild. works and shifts real good. Now i want a 6.0 which i regret not getting it from the beginning...... I'm thinking of building a 6.0 for next summer
    i want more power

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI
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  6. 12-25-2009 12:34 AM #196
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    zebra
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    ^^
    i've got about 1500mi on my swap now, too

    still ain't really had a chance/place to really let it rip or make me wish i'd got a 6.0 or cam. it did, however, make a nice pull to 100-ish a few weeks ago.

    one day i won't have to work all the time...
    then it'll be cam time
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓
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  7. 12-25-2009 12:40 PM #197
    DennisG_02Silverado
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    well i have almost 2800 on swap, and about 1500 on trans........... yes i drive alot but just want to break the crap in
    Last edited by DennisG_02Silverado; 02-27-2010 at 09:24 AM.

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI
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  8. 12-28-2009 07:31 AM #198
    xx_ED_xx
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    4.3 to 8.1 swap isnt that hard either. If any one needs info just let me know
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  9. 12-28-2009 12:20 PM #199
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    zebra
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    Quote Originally Posted by xx_ED_xx View Post
    4.3 to 8.1 swap isnt that hard either. If any one needs info just let me know
    well, if anything, pictures are an order!
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓
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  10. 12-30-2009 02:58 PM #200
    Fadingglories
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    wouldn't you have to rebuild the trans tunnel to stuff the allison in and get beefier front shocks to handle the extra weight etc.... My dad did a v8 swap on a 4 cyl once and said he had nothing but trouble with the front end after that due to undersized everything. I am not trying to shoot anyone down. i think that would be the truck of all trucks if you could squeeze it in to a short bed regular cab

    Mods: 5.3 swap / Built 4L60E / Built Transfer Case /Flowmaster super 44/ Cold Air Intake/ Custom tune/ Limited Slip Diff/ 10,000k HID's/ Electric Fans/ Dual Batteries/
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