Fox T-Bird/Cougar Forums

Technical => Drivetrain Tech => Topic started by: 420ttam420 on October 01, 2007, 10:46:39 PM

Title: found something need advice....
Post by: 420ttam420 on October 01, 2007, 10:46:39 PM
looking through local classifieds i find 3.73 Rear End

Out of a 90 Mustang LX with a 2.3L $50 o.b.o.  i got a 86 bird elan 5.0 digi dash.....would this slide right in other then i need diff wheels due to 5 lugs? and would it be suited as daily driver soon to be DD/weekend racer :P  (saving for 5.0HO need ideas on best cheapest trans......)
Title: found something need advice....
Post by: the_intimidator03 on October 01, 2007, 11:12:30 PM
the 90 lx would be a 4 lug unit unless not stock.  i would have to say it will bolt right in to ur existing control arms may be different width im not 100% clear on the interchange of exact same deminsions someone else can chip in there.  as far as the transmission goes it depends if you want a stick or auto if ur weekend racing involves drags then go with an auto.
Title: found something need advice....
Post by: V8Demon on October 02, 2007, 08:15:38 AM
If it's a stock rear end in a 2.3 90 LX it will be the same width as your 86's.
Title: found something need advice....
Post by: Chuck W on October 02, 2007, 08:35:29 AM
Quote from: V8Demon;180182
If it's a stock rear end in a 2.3 90 LX it will be the same width as your 86's.



Sorry but no.

86-88 7.5 rears found in the Tbirds have the wider housing and the wider track.(Remember we've discussed this...)

It wil be 3/4" narrower per side than what is in there and the axles in his rear will not swap.
Title: found something need advice....
Post by: the_intimidator03 on October 02, 2007, 09:22:18 AM
but the whole rear assy would swap wouldnt it chuck? he could be refering to the complete unit which is very likely.
Title: found something need advice....
Post by: Chuck W on October 02, 2007, 09:23:23 AM
Like I just said...the WHOLE thing will be narrower by 3/4" per side.
Title: found something need advice....
Post by: V8Demon on October 02, 2007, 09:30:08 AM
Chuck is correct.  I forgot what year the switch over occured on the axles.  My apologies.  CougarBirds got the wider axle housings in mid 85.  For some reason I was thinking 87.  Again sorry:shoothead
Title: found something need advice....
Post by: the_intimidator03 on October 02, 2007, 05:23:27 PM
ah i see the mention of swappin axles confused me lol
Title: found something need advice....
Post by: P71 on October 02, 2007, 06:31:13 PM
Anybody else notice it's 3.73 rear from a 90 2.3 Mustang?

I thought they were all 2.73 or 3.08's. But then I suck at rear-end identification :hick:
Title: found something need advice....
Post by: 32VFoxBird on October 02, 2007, 08:49:28 PM
Quote from: Aerobird Motorsports;180342
Anybody else notice it's 3.73 rear from a 90 2.3 Mustang?

I thought they were all 2.73 or 3.08's. But then I suck at rear-end identification :hick:


yes, you do. :hick: my 93 2.3l had 3.45 gears stock. 3.73 were commonly used in the 2.3's, due to the lack of power the motor made. :hick:
Title: found something need advice....
Post by: thunderjet302 on October 02, 2007, 10:03:15 PM
Quote from: 32VFoxBird;180374
yes, you do. :hick: my 93 2.3l had 3.45 gears stock. 3.73 were commonly used in the 2.3's, due to the lack of power the motor made. :hick:



Yep. Most of them at the yards by me have 3.73s. It's a cheap way to get 3.73 gears for your 7.5 though :hick:
Title: found something need advice....
Post by: the_intimidator03 on October 03, 2007, 09:23:39 AM
i had an 89 2.3 stang with a4ld that had the 3.73 rear
Title: found something need advice....
Post by: P71 on October 03, 2007, 10:10:23 AM
Quote from: 32VFoxBird;180374
yes, you do. :hick: my 93 2.3l had 3.45 gears stock. 3.73 were commonly used in the 2.3's, due to the lack of power the motor made. :hick:


:D :hick:

I just remember driving a 93 2.3 Vert and wondering how the hell V8 Vert's stayed together as it cowl shook and rattled all of my teeth loose...