Lots of problems with the reverse gearbox. The diff gears are around the wrong way and wear quickly. Do some research as there are FB groups talking about the issues.
Thanks Phil that’s good to know.
Not Uwe’s experience that’s for sure, and he’s been running it as a daily driver since 2016…
I will look it up however. My other option is to rebuild the VW gearbox again, but it only lasted 5 years with very little driving, so unsure that is the best way to go. Plus, the last guy I used I wouldn’t ever go to again, and I don’t know anyone in Perth.
Cheers
G
The builder may be the problem and not the gearbox.
Do you mean the VW box builder or the Subi box builder?
Hi everyone,
have decided to go the rebuild the original trannie route, as the reversed Subi is just too much of an investment right now.
I hae now found a reputable VW gearbox specialist in Perth - Mike Trewhitt - so feel it is in good hands.
Now, considering I have a naturally aspirated Subi EJ25 fitted and my 4th gear has been popping out, I will be buying new spares, hopefully heavy duty, from Weddle Industries.
Can anyone here confirm the original 4th gear ratio is 0.85? And what is the recommended ratio is for lower revs running the EJ25 - I’ve heard 0.77 is popular. Anyone here gone that route?
Finally, also considering my 16" wheels with BFG AT2 215/65 R16 tyre, should I be worrying about final gear ratio? I have read that OEM is 4.86:1, and that any change would need to be made both at front and rear.
If anyone has any exprience/knowledge to share, I’m all ears!
Thanks
Gaetan aka naughtyG
Hi Gaetan,
I have a EJ25 subie franken motor running 2L heads for higher compression and better torque down much lower in the rev range.
Even with that I decided to keep the stock ratios as I didnt want to change down gears on freeway runs with a loaded van with wife, kids and dog plus all the gear we carry.
The big tyres are a huge factor.
I’m running 235 x 75 x 15 BFGs on alloys which are extremely heavy.
Runs great and hills dont bother it in top gear.
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Thanks Scott.
I am going with the 0.77 (instead of 0.82) as I’d like lower revs on freeway, don’t mind dropping a gear if needed when fully loaded 
The parts list needed is quite a bit, I am hoping Weddle will help me in selecting all I need and quoting for the lot.
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So the rebuilt gearbox has gone in and it’s still jumping out of 4th gear as soon as any power is applied. 
It feels to me like it’s not fully engaging, but the garage said there’s no adjustment.
I’m getting married the week after next so it’s gonna have to wait, but it’ll go back to the gearbox guy first to have a look and if no luck to the garage who refitted the box. Weirdest thing is garage dude said he took it for a 20mns drive and had no problems, but as soon as I went to 4th it popped out again.
All other gears are absolutely fine.
If anyone has any input or advice on this issue it’ll be most welcome.
Thanks
Gaetan
I have no experience with this issue or fixing it, but I guess it’s worth checking the linkages and guides in the gear selector (particularly at the gear box end) are all in good condition and adjusted correctly. This can have a big impact on selecting gears correctly.
Hi Gaetan,
Very strange that its only 4th gear.
Who rebuilt the gearbox?
Maybe they missed something?
Or, maybe worn shift rod bushings which can be readjusted at the shift linkage?