3.45 lsd

[Bejoe16]

A buddy of mine is selling his 3.45 lsd. Been rebuilt approximately 800 miles ago. Very rare diff. 2600$ located in Sacramento. Pm me if you want contact info

 

[Jellobmw]

No “S” stamp after the rebuild?

 

[Krzysztof]

Isn't the gear ratio located (stamped) on the right bottom side wall? There should also be "S" stamped above the ratio numbers.

More info with examples of pictures are in several threads on the forum.

 

[Bejoe16]

Getting pictures today of that area. I already asked my buddy and he didn’t have those on his phone. Taking some today.

 

[Bejoe16]

 

[Ives]

Courtesy Bump

 

[aguirola]

Normally, what is the ratio? Why is this one rare?
Thank you.
Alberto

 

[teahead]

correct me if I'm wrong:

2800CS: 3.64
3.0CS: 3.45
3.0CSL: 3.25

 

[Ohmess]

correct me if I'm wrong:

2800CS: 3.64
3.0CS: 3.45
3.0CSL: 3.25

My 72 3.0 CSA came with a 3:64.

 

[autokunst]

correct me if I'm wrong:

2800CS: 3.64
3.0CS: 3.45
3.0CSL: 3.25

Rob, that is not entirely accurate. US 3.0CS and CSA cars came with the 3.64. It is the European CS and CSi cars that came with the 3.45, as well as certain CSLs. I think Chris posted a thorough list once.

EDIT: here is a more comprehensive list:

Speedometer and Differential Ratios

The e9 coupes came with three differential ratios and could be found both open or unlocked and locked or LSD. The speedometers were matched to the car based on which differential was fitted. Differentials The differential ratio is expressed as a fraction and is stamped on the right lower side...

e9coupe.com

 

[rsporsche]

According to @HB Chris post in the FAQ about changes to the coupe by model year
Differential
3.45 (38/11) in 2800CS,
3.64 (40/11) in 3.0CS, locking optional

my understanding is that most (if not all) US 2800cs came with a LSD. @Bejoe16 - do you know / or can you find out which car model this came out of?

what i know is that a 3.45 requires a different speedo gear than the 3.64. nothing difficult to solve with a good speedo rebuild shop - its just changing a gear while you are there. the 3.64 will give you faster acceleration with a given motor and will rev slightly higher at a given speen than the 3.45. i have posted in the FAQ the speeds / rpm with different diffs with the overdrive 5 spd. (same for the 4 spd - in the first 4 gears) - see post 11 in this thread - https://e9coupe.com/forum/threads/e9-parts-dimensions-drawings-technical-info-and-models.43743/

 

[Dan Wood]

I have a 3.45 w/o LSD in the 2800CS

 

[rsporsche]

Dan i forget, is yours an original USA model? i have heard a bunch of 'facts' about the 2800cs that i have seen not to be completely correct - such as all (USA / NA) 2800cs came with leather interiors - 'Hoffman' only ordered cars with A/C, leather ... all 2800cs had LSD. well, i have seen some with embossed vinyl on the seat back inset. i have heard of some without a LSD. I have also heard that those must have been Canadian cars. we all know that some cars have had their diffs replaced from going bad - leaks, shattered spider gears, etc. ... might not have replaced like for like.

i honestly don't know and have not seen any fact one way or another ... just trying to learn and not continue to promote anything that is not accurate.

 

[Dan Wood]

Scott:
As far as I can tell it is an original US model with original leather and AC.
Nothing to indicate that it isn't.
Thx, Dan

 

[rsporsche]

yep - that looks like a USA vin

 

[Bejoe16]

I’ve only posted for a friend of mine. I’ll ask him if he knows where it came from.

 

[Bejoe16]

Sold