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Author: Subject: 4age Gearbox choices? (Type 9 or something else?
max2503

posted on 12/4/20 at 03:48 PM Reply With Quote
4age Gearbox choices? (Type 9 or something else?

I currently have a standard type 9 gearbox married to my 4age, and with the quest for abit more power over stock, I'm kind of wondering do I stick with the Type 9?

I believe I'm going to need a rebuild shortly as she's beginning to leak oil from all places. So do I come away and try something different?

I have been looking at J160 and W58 gearboxs which are spoken about very highly.

Does anyone running one of these? or if you have a 4age....What do you have bolted to it?

[Edited on 12/4/20 by max2503]

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rusty nuts

posted on 12/4/20 at 04:50 PM Reply With Quote
Have a look at BGH Geartech
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perksy

posted on 12/4/20 at 06:23 PM Reply With Quote
Another vote for BGH

Probably the best mod I ever did to my Westy

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cs3tcr

posted on 12/4/20 at 06:42 PM Reply With Quote
John Hughes sells an adapter to mate the 4AG with and RX8 box: Adapter

The RX8 box is bulkier but will definitely handle the power of a well tuned 4AG

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SPYDER

posted on 12/4/20 at 07:41 PM Reply With Quote
Just to aid your decision making, here is the RX8 box alongside a Type 9.
I have the IS200 version of the AZ6 box in my 3SGE engined car.



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Oddified

posted on 12/4/20 at 08:12 PM Reply With Quote
Run many version in a type 9 inc tranx and quaife, by far the best i ever had was the SPC (Tracsport) semi helical gear set which was absolutely superb. Smooth, quiet and never broke it.

Ian

[Edited on 12/4/20 by Oddified]

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JimSpencer

posted on 12/4/20 at 08:21 PM Reply With Quote
Hi

Running a tuned 4AGE (circa 180bhp) in a Striker for track work, use a BGH (the 2.8 long first heavy duty) and it's been an excellent box, been abused properly for several years..
About the only thing that's an essential 'extra' is a decent gear lever (Quaife or similar) and heavy duty saddle (brass one from Burton's or similar)
You then get a proper 'bolt action' change too.

HTH

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