tremec 3550 + 3.73 gears= dissapointment???

eliaseje

Founding Member

Jun 16, 2002

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Ohio

Aug 9, 2004

#1

• Aug 9, 2004

• #1

I just installed my tremec 3550 in my stang with 3.73 gears. At 65 MPH in 5th gear I am at 2000 RPM?!?!?!? What is going on?? It has made my 3.73's feel like a 3.55 or something like that. Is the tremec supposed to do this or is it supposed to make the 3.73's feel like a 4.10?? Maybe the person I bought it off changed the gears in the tremec.?

 

Rick 91GT

Mustang Master

Nov 29, 1999

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99

PA

Aug 9, 2004

#2

• Aug 9, 2004

• #2

The Tremec first gear is not 3:35 like the base model t-5 I believe, however 4th gear is 1:1 so it is the same. The 5th gear may be a little higher ratio to keep the rpms down, which isn't a bad thing.

It is the same gear in 4th which is all the matters....

 

TT91

Active Member

May 23, 2003

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Paramus, NJ

Aug 9, 2004

#3

• Aug 9, 2004

• #3

I had the same problem with my TKO V.2, it made my 4.10s feel like 4.56s.....Solution...step down two sizes...I went with a 3.55

 

stangboy

Founding Member

Aug 31, 1999

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New Orleans, LA

Aug 9, 2004

#4

• Aug 9, 2004

• #4

What the Tremec 3550 is doing is making your 3.73s feel almost like 3.55s. What you might want to do is bump up to a 3.90 gear. Thats what I'm thinking about doing. Its because of the first gear ratio like Rick 91GT said. The base model T5 is a 3.35 and I think our Tremec 3550 is 3.27 or something so first gear isn't gonna pull like it would with a T5. Actually 1st, 4th, and 5th gears are different.

 

bmo37

Founding Member

Jun 27, 2001

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New Jersey

Aug 9, 2004

#5

• Aug 9, 2004

• #5

don't know about you but my first gear with the t5 was basically nonexistent, sometimes would drop the hammer into 2nd from the start. for a street car i acutally like having a little longer first gear which my tko500 does from me now, especially with the boost all I used to do was breakem loose all day long with a 3.73 gear

 

B

BaXTeR3221

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Jan 12, 2004

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Orange County, NY

Aug 9, 2004

#6

• Aug 9, 2004

• #6

I was just going to start a thread about this. I just installed the 2.95 set of gears in my t-5 and i have 3.90s in the rear. Car feels a little slower, but 5th gear is great, cant wait to get on the highway. I'm not worried since a blower is in the works and i was gonna change rear gears, but now i dont have to

 

Grn92LX

Fidanza Man!

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Jan 14, 2001

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Aug 9, 2004

#7

• Aug 9, 2004

• #7

First in a 3550 is 3.27 vs 3.35 in a t5, not a huge difference. 5th is .68 in both.

 

89MustangGX

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Jul 3, 2001

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Mill Creek, WA

Aug 9, 2004

#8

• Aug 9, 2004

• #8

Grn92LX said:

First in a 3550 is 3.27 vs 3.35 in a t5, not a huge difference. 5th is .68 in both.

Click to expand...

Yes!

I think you would be hard pressed to tell the difference. You can even mathematically figure it out -- ends up making the 3.73's feel like 3.64's or so in first gear.