[jimmylorrain]

hey anyone know what other fords 3rd member came with 3.55 or 3.80 gear ratio, and posi that will swap into my 65 mustang ????? thanks in advance !!!

[Irelands child]

There is no easy answer to that - you have to prowl salvage yards for 8" differentials (I assume it's an 8"). Some 6 cyl Granadas had 3.40, 3.55 and higher Some Pintos had 3.40 and higher numerically. The easiest is to spend a couple hundred, get a new set of gears and a rebuild set of bearings and seals as long as you have a good housing

[jimmylorrain]

@ irelands child, hey thank you. how do it read what the tag means on my 3rd member ??? it reads.....
w c z - e
2 80 5cb 911

[jimmylorrain]

can anyone tell me what this translates to or give me a linlk to a site that i can do it myself ??? thanks !!!

WCZ-E
2 80 5CB 911


above is the tag on my rear end.. also there is casting marks on the housing that reads......

5B11
0 10.

im wnating to put posi in it and really dont know much about this !!
THANK YOU ALL !!!

[eloc431962]

Originally Posted by jimmylorrain

can anyone tell me what this translates to or give me a linlk to a site that i can do it myself ??? thanks !!!

WCZ-E
2 80 5CB 911


above is the tag on my rear end.. also there is casting marks on the housing that reads......

5B11
0 10.

im wnating to put posi in it and really dont know much about this !!
THANK YOU ALL !!!

WCZ-E 2.80:1 8 inch gear 5 =1965 C = March B = 2ND week in the month 911 should be the plant code. JMO and it will /should have 28 spline axles also. Actually by the #s it's a 7 3/4 ring gear but still considered a 8 when talking part's. JMO
The WCZ-E should be 7 3/4 Ring gear not the 8 inch gear the 8 will be WCZ-F code.

Cole

[jimmylorrain]

@ eloc4311967 so where did you find that out from? and thank you. i want to make it posi. do you happen to know what other fords came with posi that will fit mine ???

[Deuce]

Posi rears are very rare for the 8 inch series Ford rear end. That is part of the reason most guys with the 8 inch UPGRADE to the Ford 9 inch. Posi rear are way more plentiful than the 8 inch ones.

Go here and rear about the 8 inch and 9 inch Fords ...

http://www.kevinstang.com/Ninecase.htm

And look for a tag like this on your rear end.

[kleen56]

The 8" Ford in 65 Mustangs mostly came with 2.80 gears which is the numbers on your tags. In 66, Mustangs came with 3.00 gearing. I don't know what vehicles had them but I know I had a 3rd member with 3.25 and my dad picked up a member with 3.80's at the junkyard (maybe got lucky?) I'd take Irelands advice and by a set of ring and pinion gears in the gearing you want and have a rearend shop install them. I'd advice you not to go over 3.50 in the Mustang with the C4 transmission. Anything over that and you'll be taching in the 3K range and higher. (No overdrive).

[jimmylorrain]

i got a brand new aod tranny from the transmition depot its the destroyer stage 2. heres what its got...
Includes:
HD Performance Clutches
Free Torque Converter Included 2100 - 2300 Stall
Super Firm Shifts
Transgo Full Race Shift Kit
Performance Competetion Servo "A" (Oversized)
Wide Kevlar Band
Complete Bushing Kit
Remanufactured Pump Assembly
Hardened Input Shaft
Holds In Any Gear to 5800 RPM +/- 200 RPM

[eloc431962]

If i was you i would also have to say go Irelands route on this or go to a 9 inch out of like a 67 mustang or something. JMO



Cole

[jcoby]

it's not what you asked for but the explorer 8.8 is almost the perfect size for the '65-'66 if you cut down the long side and use two short axles. 31 spline, limited slip, disc brakes, various gear ratios to be had at the junkyard for cheap. i bought one for $125. add another $150 or so to have it shortened (or do it yourself for less).

as for the 8", there are rebuilt units on ebay for $600-$800 with the gear ratio you need. they're nearly impossible to find in junk yards.