Fox T-Bird/Cougar Forums

General => General Fox T-Bird/Cougar Discussion => Topic started by: turboranger91 on August 13, 2007, 10:46:03 AM

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 13, 2007, 10:46:03 AM

i've got 3.73's in mine and i'm not sure if i like them. what do you run and how do you like them?

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: silvercat on August 13, 2007, 11:34:21 AM

I have 3:73's in mine. I like the way it takes off now, and it is ok at highway speeds. It did lose a litle on the economy side, but well worth the trade off.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: daboss351 on August 13, 2007, 02:31:33 PM

my dads T/c has the 3.73s he loves it gets great fuel economy, and with the ailing motor it needs them!

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: stuntmannick on August 13, 2007, 02:39:11 PM

I got 3.73's and think they're perfect.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: Red_LX on August 13, 2007, 02:53:00 PM

I still have the stock 3.55's and I think they kick butt.

I wouldn't change em unless i went to a 5.0 T5.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 13, 2007, 05:20:10 PM

I have 3.73s in MY TC and love them... But then I have a 5.0 and AOD in out front...

What don't you like about them???

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 13, 2007, 05:27:33 PM

i don't really know yet... it feels like the gearing is wrong for them. i sent a pm to the kid that i bought the car from. i know that he swapped out the hydro clutch for a cable one... i'm wondering if he put the v8 t5 in there too. it feels like first gear is absolutely useless.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 13, 2007, 05:37:10 PM

Quote from: turboranger91;168523

it feels like first gear is absolutely useless.

As in how???

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 13, 2007, 05:48:18 PM

as in it last about half a second and it's time to shift.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: 4bangen on August 13, 2007, 06:04:07 PM

I thought the tc's with the 5speed came stock with 3.73s?

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 13, 2007, 06:04:57 PM

Quote from: 4bangen;168548

I thought the tc's with the 5speed came stock with 3.73s?

the auto's come with 3.73's. the manuals come with 3.55's.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: 4bangen on August 13, 2007, 06:20:19 PM

oh I thought it was the other way around.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 13, 2007, 06:22:14 PM

i could be wrong, but i don't think so.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: 4bangen on August 13, 2007, 06:24:17 PM

hmm, my 5speed eats first gear like a fat kid eats cake.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 13, 2007, 06:25:48 PM

that's what i'm getting at. i've driven a lot of cars with 3.73's and they didn't feel so short. that's what makes me wonder if the tranny isn't a v8 tranny.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 13, 2007, 06:57:11 PM

Quote from: turboranger91;168558

that's what i'm getting at. i've driven a lot of cars with 3.73's and they didn't feel so short. that's what makes me wonder if the tranny isn't a v8 tranny.

A V8 tranny won't cause the problem, they have either 3.35 or 2.95 1st gears... The four banger tranny has a 3.97 1st cog...

Factory the '87-'88 5 speeds have 3.55s and the auto's 3.73...

Guessing you're suffering from "AWOIS" (All Wound Out IHI Syndrome)... After 5K ain't much happning'...

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: gumby on August 13, 2007, 07:16:51 PM

could be the opposite problem. my early tranny has a 4.03 first gear. with 3.45's in both my rangers 1st and 2nd both felt too short.

i am gonna try a set of 3.27's this time around and see how they work.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 13, 2007, 07:18:12 PM

no ihi... already t3 swapped.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 13, 2007, 07:19:27 PM

Quote from: gumby;168563

could be the opposite problem. my early tranny has a 4.03 first gear. with 3.45's in both my rangers 1st and 2nd both felt too short.

i am gonna try a set of 3.27's this time around and see how they work.

the ranger still has the m5od with the factory 3.45's and it's near perfect.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 13, 2007, 07:20:57 PM

Quote from: gumby;168563

could be the opposite problem. my early tranny has a 4.03 first gear. with 3.45's in both my rangers 1st and 2nd both felt too short.

i am gonna try a set of 3.27's this time around and see how they work.

True, but I have doubts about being able to feel .06 difference in ratio...

Quote from: turboranger91;168565

the ranger still has the m5od with the factory 3.45's and it's near perfect.

So whats the 1st gear ratio of the M5OD???

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: gumby on August 13, 2007, 07:23:15 PM

so, if youve got 3.73's, was the car originally an auto? if so, i would bet that youve got an tranny with a 4.03 first based on the cable clutch setup.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: gumby on August 13, 2007, 07:25:23 PM

Quote from: TurboCoupe50;168568

True, but I have doubts about being able to feel .06 difference in ratio...

.06, multiplied by the .28 difference in rear gear that he is accustomed to, could be felt for sure

im sure its jus "different." jus gotta figure out exactly what you are workin with to know what to change

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 13, 2007, 07:28:23 PM

Quote from: gumby;168573

.06, multiplied by the .28 difference in rear gear that he is accustomed to, could be felt for sure

OK you're likely correct, I wasn't considering the difference in rear ratios...

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 13, 2007, 07:33:11 PM

Pick a gear any gear... LOL

M5OD    3.97    2.34    1.46    1.00    0.79 (Mustang 2.3L)
M5OD    3.35    1.93    1.29    1.00    0.68 (Mustang 5.0L)
M5OD-R1    3.72    2.20    1.50    1.00    0.79 (2.3L, 3.0L Engines)
M5OD-R1    3.40    2.05    1.31    1.00    0.79 (4.0L Engine)
M5OD-R1HD    3.40    2.05    1.31    1.00    0.79
M5OD-R2    3.91    2.24    1.49    1.00    0.80
M5OD-R4 / M1HD    3.38    2.06    1.30    1.00    0.79
M5HD    4.14    2.37    1.42    1.00    0.77 (Close Ratio - Gasoline)
M5HD-W    5.72    2.94    1.61    1.00    0.76 (Wide Ratio - Diesel)
M5R2    3.75    2.32    1.43    1.00    0.75
M5R2-C    3.42    2.16    1.34    1.00

Guessing it's probably the 3.72????

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: gumby on August 13, 2007, 07:39:23 PM

yup, 3.72 should be correct for his ranger.

i didnt recall the M5OD ratios, but that puts an even larger gap between what is in the ranger and what is in the TC
3.72 and 3.45 vs. 3.97(or 4.03) and 3.73

sounds like its time to figure out what tranny is in there for sure, and pick a new rear gear if you dont like the 3.73's

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 14, 2007, 12:33:55 AM

i just got a pm back from the kid i got the car from and he says the the tranny is in fact a 4 cyl world class t5 from an 85 turbocoupe. it's a cable settup.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: bhazard on August 14, 2007, 04:31:15 AM

M5OD's came in mustangs?

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: gumby on August 14, 2007, 06:36:45 AM

the one i was using in my rangers is an 85 unit also. that should be a 4.03 box.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 14, 2007, 08:19:41 AM

Quote from: bhazard;168678

M5OD's came in mustangs?

i don't think so. as far as i know it's always come with a t5 for the manual cars.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 14, 2007, 09:32:52 AM

Quote from: bhazard;168678

M5OD's came in mustangs?

I believe the site I plucked the info from lumps all the RWD trannys into one category... Why they are calling the T5 a M5 I dunno...

Looks like I left off the T5...

linky http://www.vibratesoftware.com/html_help/html/Ford/Ford_Transmissions_Main.htm

At any rate the WC T5 4cyl tranny has a 3.97 first gear... the '84 non-WC tranny was 4.03...

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: Red_LX on August 14, 2007, 09:35:38 AM

Quote from: turboranger91;168538

as in it last about half a second and it's time to shift.

Welcome to the turbo coupe T5 man, that's just how they tend to be.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 14, 2007, 09:40:22 AM

Quote from: Red_LX;168725

Welcome to the turbo coupe T5 man, that's just how they tend to be.

Which is why a lot of turbo guys use the 5.0 tranny with the 3.35 first gear...

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 14, 2007, 09:43:05 AM

Quote from: Red_LX;168725

Welcome to the turbo coupe T5 man, that's just how they tend to be.

this isn't my first 5 speed turbocoupe. it is, however, my first 3.73 equipped 5 speed turbocoupe.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: TurboCoupe50 on August 14, 2007, 10:08:41 AM

For shiznits and giggles...

3.72 x 3.45 = 12.834

3.97 x 3.73 = 14.808(quite a difference)

3.97 x 3.55 = 14.093(stock '87-'88 TC and not really enough difference to get excited about))

3.35 x 3.73 = 12.495

3.35 x 2.73 = 9.145(or why you can wind the piss out of first gear in a stock 5.0 Stang)

2.32 x 3.50 = 8.12 (a 428CJ dosen't need all that gear ratio to get going... BTW I have a 3.00 rear in mine)

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: turboranger91 on August 14, 2007, 10:10:38 AM

there's a lot of actual good info in this thread.

i love this site.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: SLEEPER T-BIRD 87 on August 15, 2007, 11:10:50 PM

ive ran 4.10's and 3.55's and 3.73's

ill give my take on each with a 4.03 first gear T5

4.10 - stock type setup it improves around town drivability and milage as you make more power gears get shorter making it a c to shift.

3.73 - great medium this is what i run in my car currently i stepped down from the 4.10 because of a short first gear and the lack of low end boost responce.

3.55 -great all around gear good balance of milage and takeoff makes first gear pretty long compared to others.

Title: who runs 3.73's or bigger in a turbocoupe?
Post by: 88cat on August 15, 2007, 11:17:06 PM

Im running 4.10's in my TC with my t5 tranny I love them and the faster spool up is a defenite plus.

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