They are the same tranny.

 

Ok I thought they were the same but I was confused
when you said they looked different.
lates matt22

 

I was replying to DrBlasto's comment that he suspected that he had a ribbed case tranny simular to what comes in a T2. It is easy to confuse for the untrained eye.

But no NA FC came with the rib case (R526) tranny. Only the T2 models.

The 88 GTU, and 86-88 GXL manual both came with the identical M582 tranny from the factory.

 

Ya, I didn't think anything but the TII came with that tranny. I think the only thing the GTU has in common is the gear ratios. The owner's manual says the TII and GTU have the same 1 - 5 and final drive ratio. The GXL has different gear ratio--I'll have to look it back up...

 

No, again the R526 (series 4 T2 tranny) had different gears (3.483-1st, 2.015-2nd, 1.391-3rd, 1.00-4th, and .762-5th), but the series 4 GXL, GTU, Sport, SE, Base, and Luxury all used the M582 with its gears of 3.475-1st, 2.002-2nd, 1.366-3rd, 1.00-4th and .697-5th.

Maybe you are confusing it with the 'Verts which used the M50N tranny (3.475-1st, 2.002-2nd, 1.366-3rd, 1.000-4th and 3.493-5th).

 

So would the vert tranny br better than the NA tranny
I am not yet familier with the differences between the ratio's. Only that a tighter ratio will get you through the gear box faster and top end is decreased, and a longer gearbox will give you less bottom end and more top end. let me know if this is right. Lates Matt22

 

Well I know the 88 'vert came with the M50N tranny, and I have been told that most of the manual tranny S5 NA cars used it as well, but what exactly the difference is other than ratios I can't say.

I suspect that the M50N is slightly stronger than the M582, as to deal with the heavier weight of the 'verts and S5 cars.

as far as the taller 5th gear, it is simply to bring up the mileage on highway cruising, by dropping the engine RPM. I actully put the wrong ratio on my previous post for 5th and I will have to correct that tonight when I can look it up again

 

Ok so let me ask you this,
What would be better a S4 tranny
or the S5 Tranny. I have heard that
the S5 was better, any thruth to that.
lates Matt22

 

OK, I'm stupid! Icemark is right, the 88 N/A's all have the same tranny and gear ratios (I just can't remember where I heard that). The 5th gear ratios for both are: .697 for the N/A and .782 for the TII accroding to the manual by the way.

 

Looking it up again, no difference is listed for the verts for 88. Was the change in 89 with the S5?

 

Different tranny and different 5th gear.

The M582 tranny that the series 4 coupes came with had a .697 gear for 5th.

The M50N tranny that the 88 vert (and series 5 NA cars came with) had a .711 gear for 5th.

Don't know what you looked up. That info is found in the dealer POP,( the Mazda model identifier sheets, and Mazda parts sheets.

the only place its not listed is the first printing of the 88 shop manual, and that is only because it only listed the coupe and T2 models in the technical specifications.

try here:
http://www.iluvmyrx7.com/2ndgen/manu...%20CHASSIS.pdf
and here:
http://www.iluvmyrx7.com/2ndgen/manu...20BODY%20a.pdf
For the factory parts identifier information

 

Just looked in the owner's manual.

 

Okay, there seems to be a bit of confusion about what, exactly, the 88 GTU is. I own one, I drive it daily, and I've had it in little pieces all over the garage many times. I also have an 86 base parts car. Here's the list:

13b NA engine
Standard NA Tranny
LSD
GTU 5-lug alloy wheels with a STEEL spare (why?) The 86 base had a really nice looking alloy spare.
Power mirrors
Sunroof
Cruise
Power steering
Air Conditioning
4-piston brakes up front with vented rear brakes. The rear calipers are a single piston design with a wider caliper to accomodate the thicker (vented) rear rotors (brakes silly!).
No tilt
No power locks
No rear wiper
No power seats
Mine had a (really crappy) factory alarm on it. I assume this was an option.

Clarion Diversity AM/FM reciever with casette player. Antenna in the windshield for AM and standard power antenna in the rear for FM. 4" speakers in the rear towers and in the dash. None in the doors, but the places for them exist. An amplifier for each speaker (why?). The option for the Equalizer probably existed. At any rate, I chucked this crap in favor of a MUCH better aftermarket part (pioneer is great for those on a budget!).

Factory Aero kit: Rear spoiler, side skirts, upgraded mirror housings. No aluminum hood or front air-dam changes. My 86 has a tow-hook on the right side of the air dam. My GTU does not. Hmm....

Under the hood, it's identical to all other S4's. Had the option for an electric fan.

Gear ratios are the EXACT SAME as any other NA Series 4. Everything from the clutch, the tranny ratio, and the differential ratio are the EXACT SAME as any other S4 N/A, except for the GTUs, which had a TII driveline and LSD (and a lot of other changes).

5 lug wheels. The GTU came, from the factory, with 205/60/15 VR (V-Rated) tires.

Hope this clears-up any confusion


WHaCKo