T56 Magnum XL w/ 3.55 Rear Gears

[Ls_Eater]

You're going to want 4.09's.

Also I'd recommend using the Tremec brand fluid - it makes warranty claims and stuff MUCH easier with them.

I have a 2.97 - currently 3.73's and its extremely long, I can't imagine how long 3.55's would be - Swapping to 4.10's (I have an old OEM Ford set before they stopped producing them).

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[LunarS550]

Trans shipped yesterday, the day I ordered it. I’m stuck with 2.97 unless I send it back to exchange it.

 

[Ls_Eater]

Trans shipped yesterday, the day I ordered it. I’m stuck with 2.97 unless I send it back to exchange it.

4.10’s and you’ll be golden

 

[LunarS550]

4.10’s and you’ll be golden

Hopefully, hoping 4th still has some balls

 

[J17GT]

Hopefully, hoping 4th still has some balls

Turn up the volume and listen to the 3-4 shift on this solo pass. You can really hear the rpm drop. Ignore the low mph and ET, the DA was hot garbage!

 

[LunarS550]

Wow that actually sucks, I’ll call a local Tremec distributor and see if they’d be able to exchange

 

[Ruiner46]

I have 2.66 with 3.73's. My trap speed was right at 130mph and I ended up crossing the line at 7800rpm in 3rd every time and kissing the rev limiter. 4.09's would be perfect for a shift to 4th with the 2.66 as well. With 2.66, if you trap under 130, then you can just stay in 3rd.

 

[LunarS550]

No go on local exchange, not looking to pay to ship it back for exchange. Gonna run the 2.97 and break everything in with the 3.55’s then get 4.10’s installed

 

[LunarS550]

Bit bummed ford performance doesn't offer 4.09's anymore. Any word on Richmond Gear?

 

[Ls_Eater]

Bit bummed ford performance doesn't offer 4.09's anymore. Any word on Richmond Gear?

Yukon is your next best bet

 

[LunarS550]

Yukon is your next best bet

Options are Yukon 4.11's or my 3.73's. If the Yukon 4.11's are compatible with my Torsen.

 

[Ls_Eater]

Options are Yukon 4.11's or my 3.73's. If the Yukon 4.11's are compatible with my Torsen.

The Yukon are compatible

 

[LunarS550]

Thanks I'll go with those

 

[Ls_Eater]

Thanks I'll go with those

No problem. - feel free to reach out to lethal if you haven’t decided where to buy and mention me - they’ll help you out

 

[J17GT]

Bit bummed ford performance doesn't offer 4.09's anymore. Any word on Richmond Gear?

Didn’t even realize that. I bought my 4.09s back in 2021. When did they stop making them?

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