Gears for my 84?

[Towrag]

Hi All

Can someone point me in the right direction for info for diff gearing for my 84? It's seems there is a wealth of gear kits for the 8.8 and bugger all for the 7.5 or am I best to swap out the rear for an 8.8? Is it a direct swap out?

[mcb82gt]

Here you go. 7.5"

https://www.summitracing.com/search/...rder=Ascending

[Towrag]

Great thankyou

[erratic50]

What are you naming for power?

Within 30K miles most stock 5.0HO motors that have lived a spirited life put their 7.5 at the top of the scrap heap

I have one with less than 50K miles from my 85 — it’s equipped with 4.10’s but a pinion seal leaking mofo

The 7.5’s just aren’t tough like the 8.8’s and 9” diffs are.

[xctasy]

Im in Dunedin.Whole Mustang V6 and convertable 3.8/3.9 liter SN95s are around in abundance as Japanese imports like my old 81 3.3 in line six..last one sold for 4800 NZ dollars. My last Explorer, $1800. Wrecked, a wider 1994 to 2004 8.8 inch axle is about 250 dollars from Manhiems. The key part is that the 7.5 axle shafts are the same strength as the 8.8 axle shafts....they are interchangable. The 7.5 ring and pinion is the weak lonk...its a Capri 2800 Injection or 3000 GXL V6 part based on the German Cologne ZF Atlas Axle. But its not exactly the same. Thats what Dick Johnson used in his Group A Mustang. For you, an axle and gearing change isnt needed unless you break it.

The five lug and disc brake conversion with proper 11.4 inch front discs and nice 11 inch rears will be easily done by an axle swap from an 8.8 94-04 Stang. Your best options are copying Escort GTs.

You car is a T5 equiped early 84 with 98 SN95 17s, so eliminte buying the wrong stuff and find a 3.27 equipped 8.8 inch axle from a 3.8. The wheel offset and track can be adjusted by using the stock K member IFS you have, and buying a dual exhaust tee and some ball joint adaptors to run the 94 spindels to hold the later five stud front disc brakes.

Jack Hidely here will help you zero in on a cost effective option to go five stud and disc brakes with a good strength axle assembly that has big discs.

For New Zealand driving with its California coast like sections of Hail Mary full of grace death or glory passing zones, something like the gearing of an 2002 Cobra 4.6 would be perfect.

The best Steering/booster/brake and axle combination for a New Zealand Fox, youd be best talking to XAFalcon, Tristan from Hamilton, who has done a lot of work on SN95s, or Steve Preston, an 84 V8 Muscle Car racer.

These cars are so much better set up than Commodores, and respond exceptionally well to the better RaceFab style production parts. Aussie PBR parts and BTR bits werent as good as the best Saleen spec parts.

If you want a really good, dependable plan, I'd suggest Tristan, Steve P, or two of my mechanics from Dunedin. The gear ratios of a US 5 speed are way to wide for New Zealand unless you are in Auckland traffic jambs. You need to think about what your engine mods are going to be, your budget, and your investment in it. Certification is cheap in NZ but bad advice and wrong steering brake front IFS arms and axle ratios that dont suit the planned t(y)res your car needs might put you in the poor house.

For me, 245/45 17s and a move up to four wheel discs with five studs and the later axle should only be a parts swap from a 94 four wheel disc 8.8 " axle Mustang.

Jack Hidelys advice is availiable on skype, and its free, and there are few times his advice isnt the best in the world.

[xctasy]

See for tires escogt.

http://vb.foureyedpride.com/showthre...17-front-tires


If your are in the North Island, I can suggest help from Tristan or Steve. I can talk with them, and give you sone advice as they are total 5 liter Windsor die hards with exceptional experience.

If in the South Island, youve got two really awesone guys who have Group A 1984 Mustangs. One of them did the services on my 81.


In a New Zealand setting, because if the moderate 500 dollar cost if low volume vehicle certification, you could keep the four studs, and the 7.5 axle, and just add bigger four wheel disc brakes like the early Thunderbird 1983 Turbo Coupe ran. Then you could just focus on getting the basics done.

I discussed a 9 inch and XE 289/279 mm discs with Roy McDonald in Dunedin, but he felt the best option was stock US Ford axle and brake parts, but he didnt say no to a 9 inch or Hoppers Stoppers Aussie PBR based parts if thats what I wanted. Everyone knows how tough the Aussie market 9 inch drum brake axles onthe 59 to 1974 cars were. The import 9 inch disc brake axles had a dangerous shrink ring problem, but the aftermarket XE Fakcon rear discs are very strong and mate very well to a 58 inch XY axle, and they are a nice swap in an 84 Stang