4R swap + procharger - 2003-04 Mach 1 Registry Owners Club

ScreamingMach46 · 09-25-2010, 07:29 PM

Well my 3650 is a POS and I'm wanting to swap it out for a 4R70W but would like to know what has to be done to the trans to make sure it safely holds the 400+rwtq and 6500rpm I plan on after I pick up a procharger.

I was thinking I'd do a manual VB to save from having to get a PCM and full retune but do the clutch packs or any other internals need to be replaced?

I'm looking at an 03 GT 4R70W with a PI 3200 stall for $350, should I buy it or is there a better option?

jaimoe · 09-25-2010, 07:46 PM

Talk to Darrin (member on here). He owns BC-Automotive. He builds the 4R70W for a living. He is the MAN when it comes to these trannies.

09-25-2010, 07:29 PM	#1
ScreamingMach46 Registered User Join Date: Dec 2008 Location: Chicago, IL Posts: 907	4R swap + procharger Well my 3650 is a POS and I'm wanting to swap it out for a 4R70W but would like to know what has to be done to the trans to make sure it safely holds the 400+rwtq and 6500rpm I plan on after I pick up a procharger. I was thinking I'd do a manual VB to save from having to get a PCM and full retune but do the clutch packs or any other internals need to be replaced? I'm looking at an 03 GT 4R70W with a PI 3200 stall for $350, should I buy it or is there a better option? __________________ 2004 Mach 1 - Screaming Yellow - 5 speed - IUP - 1 of 624 Full Bolt-ons, Built Rear, NX 100 shot, tune by Tim Barth @ MPH N/A - 12.7 @ 107 (1.70) N2O - 380rwhp 487rwtq 12.03 @ 110 (1.55) SOLD 2004 Cobra - Screaming Yellow - T56 - 1 of 299 KB 2.8H @ 20lbs, 98 Intake Cams, E85, Tune by Tim Barth @ MPH 711rwhp 635rwtq

09-25-2010, 07:46 PM	#2
jaimoe Speed addict Join Date: Apr 2007 Location: Miami, FL Posts: 648	Re: 4R swap + procharger Talk to Darrin (member on here). He owns BC-Automotive. He builds the 4R70W for a living. He is the MAN when it comes to these trannies. __________________ Best time 1/8th mi--7.65@90MPH 2003 DSG Mach 1 99/01 Cobra front bumper Darrin-Matic w/3500 stall converter 100 Shot 4.10 Gears Stock Springs KYB AGX adjustable shocks/struts tubular LCAs UPR dbl adj UCAs Custom SCT Tune 255/40/18 front 295/35/18 rear FR500 Wheels Custom RAI UPR O/R X-Pipe Roy spacer Flowmaster 40's I may not be as good as I once was, but I'm as good once as I ever was." "Just an old man having fun"

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