overdrive

Submitted: Wednesday, Jul 21, 2004 at 01:24
ThreadID: 14854 Views:1688 Replies:5 FollowUps:0
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i was wondering if an overdrive can be fitted to an existing 4 speed box in an fj45 any info would be appreciated, thanks.
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Reply By: Well 55 - Wednesday, Jul 21, 2004 at 07:23

Wednesday, Jul 21, 2004 at 07:23
Yes you can fit a Fairy O/D to the 4sp, but very hard to get.

I know where there is one to suit a 82 HJ47, not long rebuilt. It was swapped for a 5sp.
AnswerID: 68758

Reply By: Member - Pesty (SA) - Wednesday, Jul 21, 2004 at 08:48

Wednesday, Jul 21, 2004 at 08:48
Marks Adapters make a overdrive for the cruiser, not sure if they are still avail. The 4 speed box with the overdrive is a stronger setup than the 5 speed.
AnswerID: 68765

Reply By: Member - Bob - Wednesday, Jul 21, 2004 at 08:50

Wednesday, Jul 21, 2004 at 08:50
One way to get higher gearing is to fit bigger diameter tyres or wheels. Even with engineering cert this may be cheaper than O/D unit or new box. Going from 30 inch to 33 inch tyres would give a 10% higher final drive ratio.
AnswerID: 68766

Reply By: Billy - Wednesday, Jul 21, 2004 at 11:37

Wednesday, Jul 21, 2004 at 11:37
My brother in law has one on his 4sp trayback, I think it's made by Superwinch. It can split all gears by adding 25% if memory serves. i think it may have come from Marks adaptors but not sure.
AnswerID: 68786

Reply By: FJ45 Matt - Wednesday, Jul 21, 2004 at 16:12

Wednesday, Jul 21, 2004 at 16:12
well 55 if you can let me know about where this o/d is and how i can get in touch with em that'd be great
AnswerID: 68829

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