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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Tranny + gears... synergistic effects?

  • Thread starter Thread starter 2k3gt
  • Start date Start date Oct 4, 2004

2k3gt

New Member
Apr 20, 2003
103
0
0
York, ME
Oct 4, 2004
#1
  • Oct 4, 2004
  • #1
Alright guys, heres the deal. I'm thinking a bit in advance and trying to plan what I'm gonna do with the ride... and I've decided that I'm gonna get a power adder as soon as im done with the basic worthwhile boltons. Theres a problem though.. I'm auto, and I'd like to swap to a 5, maybe 6 speed. A lot of work to do, I know. But what would be the best combination for a twin screw, or maybe even twin turbo app?

I've heard 3.73's are best for FI cars... but if I get a 6 speed does that mean I'll need a steeper gearset for the same effect? Would 5 gears be enough for 4.10's and a 8-9# blower or turbo, or is the 6 speed really necessary? And on the side.. are forged internals absolutely necessary for a street-only car, to the point where a failure is inevitable?

Broad questions, I know. But I possess only a very rudimentary technical knowledge of cars in general. Any advice would be very helpful.
 

jrc_03_gt

New Member
Jan 1, 2004
786
3
0
Oct 4, 2004
#2
  • Oct 4, 2004
  • #2
I have 4.10 gears with a 5 speed tremec 3650 transmission @ 90 MPH I tack 3000 RPM'S. I dont have a supercharger. I have heard that if you are going to supercharge dont go higher than 3.73 gears.
 

2k3gt

New Member
Apr 20, 2003
103
0
0
York, ME
Oct 4, 2004
#3
  • Oct 4, 2004
  • #3
Yeah, I read that alot from the 4.6 forum... but would it be okay to get 4.10's with the cobra 6 speed and a power adder, or would it still be too much?

How would the stock rearend hold up to ~400rwhp?
 
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