AU 3.7 gear prices?

[InfernoSR]

Whats the going rates on 3.7 gears for AU's? Where abouts can i get them from?

[GK]

Originally Posted by BLUEPRINT

Whats the going rates on 3.7 gears for AU's? Where abouts can i get them from?

Any diff joint will have them.

The lowest I've been quoted is $220 for good second hand units, but I paid $559 for non genuine new gears. The Borg Warner stuff is another $100-150 on top of that, but if you ring around, you might be surprised what you find.

GK

[StealthAu]

Originally Posted by GK

Any diff joint will have them.

The lowest I've been quoted is $220 for good second hand units, but I paid $559 for non genuine new gears. The Borg Warner stuff is another $100-150 on top of that, but if you ring around, you might be surprised what you find.

GK

What do you mean by the Borh Warner stuff?

[GK]

Originally Posted by StealthAu

What do you mean by the Borh Warner stuff?

He's a cousin of Borg! He lives right next door in the locality of Keyboard! LOL!

GK

[sly]

IIRC Borh Warner was the Swedish chef on the Muppet Show... bork bork bork!

[GK]

Sly I believe we are revealing two things to the AUvian world.

1. Our age - The Muppets were good, but not a patch on Sesame Street!
2. Our inability for comedy!

LOL!

GK

[FGII-XR6]

Originally Posted by GK

Sly I believe we are revealing two things to the AUvian world.

1. Our age - The Muppets were good, but not a patch on Sesame Street!
2. Our inability for comedy!

LOL!

GK

we are in fine form tonight PMSL
borg warner is the original manufacture of the diffs StealthAu

[StealthAu]

Originally Posted by au3xr6

we are in fine form tonight PMSL
borg warner is the original manufacture of the diffs StealthAu

I realise Borg Warner is the diffs used in the AU, along with almost every other car built in a long time, I just didn't take in what GK said at first, just a tad slow today

[sly]

Originally Posted by GK

Sly I believe we are revealing two things to the AUvian world.

1. ...
2. Our inability for comedy!

Speak for yourself... :

[LG]

Hey mate,

Check out these guys, pretty cheap and in NSW.

http://www.difftechnics.com.au/

They have any gears for $495 at the moment.

You have to make sure you get the right gears though, as I believe you have a standard Falcon, which means a 3.08 housing. Thus, you can't slot in a 3.45 or 3.73 BW gears, as they won't fit. You need to look for Skyline or Commodore gears I believe.

Check up on it, goodluck!

[GK]

Originally Posted by LG

Hey mate,

Check out these guys, pretty cheap and in NSW.

http://www.difftechnics.com.au/

They have any gears for $495 at the moment.

You have to make sure you get the right gears though, as I believe you have a standard Falcon, which means a 3.08 housing. Thus, you can't slot in a 3.45 or 3.73 BW gears, as they won't fit. You need to look for Skyline or Commodore gears I believe.

Check up on it, goodluck!

LG is right. But the measurements for the housing are 7 and a half inch or 7 and 3/4 inch. IIRC, the BW gears will fit 7 and 3/4 and 7 and 1/2 housings with some modification. A place that only does diffs will be able to tell you about it though.

I put aftermarket gears in my diff for this reason. The BW were $150 dearer including the mod needed to get them into my housing.

The 3.08 LG was talking about was the stock diff ratio for the Forte, Futura and SR autos.

I may have missed something in there, but I think that's pretty much all correct.

GK

[ratman]

Originally Posted by LG

Hey mate,

Check out these guys, pretty cheap and in NSW.

http://www.difftechnics.com.au/

They have any gears for $495 at the moment.

You have to make sure you get the right gears though, as I believe you have a standard Falcon, which means a 3.08 housing. Thus, you can't slot in a 3.45 or 3.73 BW gears, as they won't fit. You need to look for Skyline or Commodore gears I believe.

Check up on it, goodluck!

Not quite, BW make all gears to suit the full range of Falcons but there are specific diff changes through the years that need to be carefully looked at. Skyline gears are rubbish, diff guys were slotting those things in because they could get cheap used items very easily. For my money, I went BW 3.73s and they are an awesome bang for buck mod. Talk to the guys at Bosnjak engineering in Sydney (02) 9757 2133 - they'll even quote u part numbers as a courtesy out of town.

[Mechan1k]

Originally Posted by LG

Hey mate,

Check out these guys, pretty cheap and in NSW.

http://www.difftechnics.com.au/

They have any gears for $495 at the moment.

You have to make sure you get the right gears though, as I believe you have a standard Falcon, which means a 3.08 housing. Thus, you can't slot in a 3.45 or 3.73 BW gears, as they won't fit. You need to look for Skyline or Commodore gears I believe.

Check up on it, goodluck!

OK ... reading this ... is this the case if you have factory 3.23's as well ... will i need the housing modified to fit 3.7's?????

[sly]

Originally Posted by Mechan1k

OK ... reading this ... is this the case if you have factory 3.23's as well ... will i need the housing modified to fit 3.7's?????

I didn't need to get my housing modified. BUT... the gearset that came in when the workshop ordered it wasn't the Falcon-sized one. I've got a slightly smaller diameter set as made for the VR Commodore. They reckon it'll be up to the task (IIRC the VR HSV GTS used the 3.73 gears behind a 5.7 litre stroker and T56 6-speed???) but a bit noisier than the Ford-specific gearset. So far it's a lot quieter than the original 3.23's that racked up nearly 330,000km LOL!

[The Monty]

3.08 was also the ratio for the fairmont S1, but I think Ghia had a different ratio.

[InfernoSR]

So much to think about... what about the XR6 ratio?

[StealthAu]

XR's had 3.45's fitted.

[InfernoSR]

So am I able to fit XR diff gears into my (what i presume) Forte' diff? I just need to know what options i have to play with and rough costs.

[FGII-XR6]

XR gears should be a direct fit you might be better off doing what i did for $600 I picked up an XR diff complete that had done on 38 000Ks

[InfernoSR]

Originally Posted by au3xr6

XR gears should be a direct fit you might be better off doing what i did for $600 I picked up an XR diff complete that had done on 38 000Ks

Are they IRS? is it a big job changing from live to IRS?

oh, and 3x-puursui7, no problems with the hi-jack IMO, we are all here to learn :P

[FGII-XR6]

Originally Posted by BLUEPRINT

Are they IRS? is it a big job changing from live to IRS?

oh, and 3x-puursui7, no problems with the hi-jack IMO, we are all here to learn :P

no fitted an XR 3.45 LSD live axle these were fitted with the HP (non VCT) engine

[FTe_XR8]

sorry to hijack but wat would an ex-cop car have seen as though they kindly put LSD into them for us same as an XR?

[sikford]

so whats supposed to be standard gearing for a series 2 fairmont ghia???lol. IRS also.

[GK]

Originally Posted by sikford

so whats supposed to be standard gearing for a series 2 fairmont ghia???lol. IRS also.

It was a 3:23 or 3:45 wasn't it, to give it some more punch with the extra weight of all the goodies!

Can someone confirm, I checked my manual, but there's no mention of it. Maybe the workshop manual will help. I'll look tonight if I remember.

GK

[sikford]

Originally Posted by GK

It was a 3:23 or 3:45 wasn't it, to give it some more punch with the extra weight of all the goodies!

Can someone confirm, I checked my manual, but there's no mention of it. Maybe the workshop manual will help. I'll look tonight if I remember.

GK

ah ok, i was told that it was 3.45 but just wanted to make sure, will be gettin 3.9's but will sell the ones out of the car...

[blueoval]

Ive been watching this thread closely.

So what your saying is get a complete diff from an XR6 HP 3:45 ratio non-IRS and it should be a complete swap over?

[FGII-XR6]

Originally Posted by blueoval

Ive been watching this thread closely.

So what your saying is get a complete diff from an XR6 HP 3:45 ratio non-IRS and it should be a complete swap over?

yes it bolts straight in just make sure you change the speedo gear. the fairmont ghia had a 3.23, only the XR had 3.45

[InfernoSR]

Originally Posted by au3xr6

yes it bolts straight in just make sure you change the speedo gear. the fairmont ghia had a 3.23, only the XR had 3.45

But is the IRS an easy enough swap over?

[StealthAu]

Originally Posted by BLUEPRINT

But is the IRS an easy enough swap over?

Depends on what you call easy, it is a matter of replacing the entire diff and all suspension components (tailshaft too?)

[InfernoSR]

Originally Posted by StealthAu

Depends on what you call easy, it is a matter of replacing the entire diff and all suspension components (tailshaft too?)

Easy is things that are simply bolted... harder is when i'd have to cut and shut steel frame work... (although not that hard, as i've done it all before : )