Hey all, I'm looking at some winter upgrades for my Autocross car. We run pretty long (mile +) courses and I'm constantly riding the rev limiter, and shifting to 3rd usually doesn't make sense. My thoughts were to swap in the SRT6 differential for the higher gears, and while I'm at it add a LSD unit. My car is a 2005 limited, NA, 6 speed car.

Questions:

#1 The actual diff housing is same between them, correct? (I'm thinking I will need to swap the driveshaft connector and maybe the axle connectors?)

#2 Has anyone looked at this unit? - https://www.tractionconcepts.com/2000-2004-Mercedes-Benz-SLK32-AMG-LSD-Kit-p/tcxcmbcus1.htm - About 1/2 the price of the Wavetrac unit.

Thanks for any help / advice you can give.

-Gary

 

The differential housing are NOT the same. Search wavetrac in the search box in the upper right corner; Plenty of info

 

Well, I was going by this thread which states they are the same -> https://www.crossfireforum.org/forum...ferential.html

And I have an SRT6, and an NA car and the diffs look the same... From what I've read, I'll need to swap out the driveshaft mount, but wasn't sure about the axles.

Thanks, Gary.

 

Better look again at those differential housings and the half shafts on the SRT are larger in diameter than the Limited. I to have both a SRT6 and a Limited.

 

Gary they do interchange,, just swap the yoke on the diff the srt yoke is larger ,,with the std shift ,,it all works ,,with a auto tranny you need a new tcu set up for the rear in the car,, I have swaped about 40 of them so far ,, i have a 307(srt), a 327 (limited) and a 346 all with tcu for a srt i sent u a pm .. this is a easy and simple swap .

axles are the same ,,,only 2004 has 2 piece axle and there you use either a 2005 or newer imited or srt axle

https://www.crossfireforum.org/forum...y-up-sale.html

https://www.crossfireforum.org/forum...-one-hour.html

https://www.crossfireforum.org/forum...ad-racing.html

 

Thanks, that gels with everything I've seen / read so far. Everything from a SRT6 has bolted on to this car so far (Brakes, Springs, Sway Bars) and I really couldn't detect a difference in the housings. Mine is a 2005 so I'm thinking the axles will work ok.

Have you seen this unit? -> https://www.tractionconcepts.com/2000-2004-Mercedes-Benz-SLK32-AMG-LSD-Kit-p/tcxcmbcus1.htm

It appears that it will work, and they think it will as well. They want to verify some dimensions after I get my hands on the diff before committing.

Thanks again,
-Gary

 

don't bother with it ,,,unless you have a diff to replace , it will ruin the diff it works on friction, tried one in 2007 lasted 3 weeks had to replace diff. they say it has improved over the years,, how it works , it pushes the spidter gears outward to the center section housing until they lock up .

 

I better get back under the car and look closer as I seem to be wrong. amx1397 has swapped many with different gearing as well. Listen to him; he is the expert on this.

Just a thought: It may be easier and faster to swap the entire rear end of a junked SRT into your NA. Drop the entire unit, the sub frame (carrier frame) and all the suspension with the hubs attached from the junked SRT onto your NA. The only thing then that would need adaption is the yoke/flex joint to your driveshaft. You would need to move the fuel pump and filter out of the way and deal with the parking brake cable, but only four bolts hold the carrier to the body, and the sway bar is easy to deal with.

 

That does seem like it would be easier, but I don't have a complete unit to swap in. I've found an SRT Diff from a guy that wants my lower gears for his SRT, so we're planning a swap. I've had to lower my rear assy to swap in the SRT Springs and sway bar already so I'm pretty familiar with that process.

Thanks for all of the info and advice, it looks like the Wavetrac LSD unit is a superior component compared to the other units.

-Gary

 

ok the differance: srt 6 and na rear1/2 of the car
rear springs ;;;;use srt on a lilited and the tire clearance will be about 5"
also the spring spacers are different//also different left to right.
srt has 307 gears and a larger yoke 3.25 center to center on two of the legs
limited has 327 gears a smaller yoke 3.00 C 2 C.
so if you change the subframe,,,waste of money and work. I did post how to change the diff in one hour .

 

Yep, I've already got SRT6 rear springs, SRT6 brakes front and rear, and SRT6 rear sway bar on this car. SRT6 front springs and a larger front sway bar are also on the agenda for this winter / spring.

I'm actually completely illegal in DS class, but our club is kinda lax on that part. Until I start beating the fast AWD cars, nobody has complained yet. Hopefully next year I can give them some competition.

Thanks, Gary.