Im planning on getting 3.73 ford racing gears for my mustang, is it necessary to get a t-lok at the same time?

 

not necessary, but it's the best time to put one in! The labor savings alone will pay for it (compared to buying one later and then putting it in).
They have to pull out the stock carrier anyway, and bolt the new gears on, and put it back in. Putting a t-loc back in instead is no big deal since it's all taken apart.

I'd recommend though, and you can search around, depending on what you want to do with the car (how much power you want to get to), to think ahead a little. If you plan on putting on a turbo or supercharger, put in a Detroit true-trak instead of a t-loc; you'll pay more for it, but it is MUCH stronger and will take what power you can throw at it later.
If you plan to stay N/A including with bolt-ons, then going the t-loc route it a good choice.
Just do it at the same time as gears right away

 

Not necessary but should be mandatory. 3.73 gears putting the power throught 1 tire = your going to have no traction! Any kind of spirited driving is going to go up in one wheel tire smoke. Install the gears & t-lok together.

 

got it, Im looking at the Ford Racing T-Lok kit. This is my daily driver, im not planning on supercharging it or turbo at the moment. How much would it cost to install gears and the t lok?

 

I would do both at once man.. With our stock 3.3x i lose traction fairly easy.. I could imagine one wheel peel with 3.73's.

 

About 270 for gears, 200 for t-lock, shipping, thats about $500 for parts. Installation will be about 200-300, so you are looking around $800 IMO.

 

I priced this route before going with a GT takeoff. My FRPP dealer quaoted me $389 for T-lok and 3.73 gears (FRPP obviously). They wanted $200 for the install...so I could get out the door for $600.

 

Damn your dealer is awesome them.. mine sucks...

 

i just paid $574 dollars for the installation only of 4.10's today. i already had the gears bought bfore i got there. i know it was high!!

 

i was quoted ~$300 to have my motive 3.73s and detroit true trac put in, i had a total of $450 in parts

built 7.5 > stock 8.8