GT Gears

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GT Gears

Postby jebiga41 » 02 May 2019, 13:14

For many of you out there running higher powered engines, heavy campers, bigger wheels and peace of mind. I am pleased to announce that I shall be able to provide you with the option of heavy duty GT Gears for your Syncro. which as far as I am aware of are the only gear manufacturer to offer any type of warranty on their gears especially for larger than stock engines although I could be mistaken. They are not cheap but the option is there for those who are interested. They also do Crown and Pinions Mainshafts and billet cases and other bits and bobs anyhow heres some highlights from the samba article about their gears https://www.thesamba.com/vw/forum/viewtopic.php?t=672885&postdays=0&postorder=asc&start=0

Image
GT gears feature an F1 racing gear tooth profile, with helix angle adjusted for quieter street operation. They won't wear out prematurely or in a cocked pattern, but rather they'll develop uniform wear as shown on this used GT gear. (Note the prominent tip relief feature in the design, which eliminates wear on both tooth tip and tooth root.)
Image

The need for higher quality transaxle parts has become painfully apparent to many in the Syncro community, especially to guys like myself with overpowered and overloaded Westfalias. I've shared photos of my own premature gear wear (admittedly due to my love of on-ramp acceleration).
2nd and 3rd gears on their way toward failure:
https://www.thesamba.com/vw/gallery/pix/985965.jpg
https://www.thesamba.com/vw/gallery/pix/985975.jpg

Equally disconcerting are premature failures of special ratio aftermarket gears that develop pitting after 30-40K noisy miles. (One of these belongs to a Samba member.)
https://www.thesamba.com/vw/gallery/pix/1566916.jpg
https://www.thesamba.com/vw/gallery/pix/1566915.jpg
https://www.thesamba.com/vw/gallery/pix/1608164.jpg

While a number of us are presently evaluating 4th gears and R&P sets from Europe, I've also been bugging my old Porsche gear manufacturer to make a special run of gears to cover the needs of myself and a couple other discerning Syncro enthusiasts. He's finally come through, and I'm pretty happy with the results:

GT gears feature an F1 racing gear tooth profile, with helix angle adjusted for quieter street operation. They won't wear out prematurely or in a cocked pattern, but rather they'll develop uniform wear as shown on this used GT gear. (Note the prominent tip relief feature in the design, which eliminates wear on both tooth tip and tooth root.)
I


"The finish grinding and attention to detail is unparallelled by any other manufacturer of Porsche or VW gear "
Image
To quote "GT VW gears are guaranteed for 50,000 miles when installed in a Van with 2.5 or smaller VW or Subaru normally-aspirated gas engine, and we have a 90-day open return policy on ALL SALES." "I have no problem extending a 3-year warranty on the parts I send to you. Our gears should last well over 150,000 miles. All our 2nd-4th gears have replaceable synchro cones/engagement teeth. Not easily replaced, but possible." Whilst they are more expensive "You get what you pay for, and sometimes less" lots more details here
https://www.thesamba.com/vw/forum/viewtopic.php?t=672885&postdays=0&postorder=asc&start=0 drop me a line if you have an enquiries or to discuss various options Paul
VW T3/T25 and Syncro Gearbox rebuilds
http://vantopia.ie
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Re: GT Gears

Postby silverbullet » 02 May 2019, 18:40

Do you have any guide prices?
For instance: whats the hardware cost for a standard ratio gear set for a petrol transmission (4.86 final drive, no plans to change that)
I'll be putting 275 Nm (peak) of 3.2 wbx6 through it.

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Re: GT Gears

Postby jebiga41 » 02 May 2019, 19:27

silverbullet wrote:Do you have any guide prices?
For instance: whats the hardware cost for a standard ratio gear set for a petrol transmission (4.86 final drive, no plans to change that)
I'll be putting 275 Nm (peak) of 3.2 wbx6 through it.

Sent from my S60 using Tapatalk

about 4000 dollars in total plus shipping import duty and shipping charges. Probably just over 5000 euros That includes crown and pinion 1st 2nd 3rd and 4th gears, a HD 3/4th syncrohub, a mainshaft and metal caged gears for 3rd and 4th gears (recommended by the supplier) mainshafts are drilled for extra oil flow and 2nd-4th gears have replaceable synchro cones/engagement teeth. To quote Paul "I have no problem extending a 3-year warranty on the parts I send to you. Our gears should last well over 150,000 miles."
VW T3/T25 and Syncro Gearbox rebuilds
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Re: GT Gears

Postby jebiga41 » 02 May 2019, 19:54

Image
Image
Image
VW T3/T25 and Syncro Gearbox rebuilds
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Re: GT Gears

Postby jebiga41 » 02 May 2019, 19:54

Image
Image
Image
VW T3/T25 and Syncro Gearbox rebuilds
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Re: GT Gears

Postby silverbullet » 02 May 2019, 20:45

Thanks. So if I keep my 4.86 (its absolutely fine) its about a £3k upgrade, plus labour for reassembly

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Re: GT Gears

Postby 4x4 Bus » 02 May 2019, 21:17

I see the milage guarantee only applies to petrol engined syncro's?
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Re: GT Gears

Postby jebiga41 » 03 May 2019, 07:51

4x4 Bus wrote:I see the milage guarantee only applies to petrol engined syncro's?

yep what the manufacturer says "We do not warranty for diesel .. however, we offer straight-cut 4th gears, which although they are noisier, solve some of the issues inherent to diesel installs."
VW T3/T25 and Syncro Gearbox rebuilds
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Re: GT Gears

Postby jebiga41 » 03 May 2019, 09:43

Guide prices in sterling for the above (this includes all customs paid )

3rd or 4th gear sets each (incudes fixed and Ratchet gears with removable cone/dog teeth) £600
Mainshaft plus matching ratchet 1st and 2nd gears and free 3/4 HD Synchro hub £1800
3/4 HD Syncro hub £175
Crown and pinions rear £1030
Crown and Pinion front £1020
Anyone interested please email or pm me prices do not include shipping to the Uk but I'm over quite often so can often deliver to an event or ship to you from there to save you a few quid if you can wait.
VW T3/T25 and Syncro Gearbox rebuilds
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Re: GT Gears

Postby silverbullet » 03 May 2019, 17:20

Am I correct in thinking that its usually 3rd and 4th that unzip with big torque?
Seem to recall seeing someone in the 'states with a SVX syncro that shredded 3rd when he nailed it overtaking on the highway.
I am now slightly concerned as I will have a similar amount of torque on tap and I WILL make use of it.

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'85 syncro Caravelle twin slider, '90 SA Microbus project

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Re: GT Gears

Postby Aidan » 03 May 2019, 17:58

Pete stripped 4th with his SVX engine, carried on for 70 miles in 3rd : ) Rebuilt box is still running with stock gears.
Weddle gears are absolutely fine for your wbx 6 even if they don't warrant them as such it's just turbo diesels driven as if they are stolen with no mechanical sympathy that cause an issue - T4, T5 and T6 boxes don't like them either but they are disposable
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Re: GT Gears

Postby 4x4 Bus » 03 May 2019, 18:29

I have been using TDI's in my syncro for probably longer than anyone else in the UK and have never stripped a gear. Standard or Weddle. C&P's yes but not gears.
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Re: GT Gears

Postby silverbullet » 03 May 2019, 20:35

I dont doubt that there are hidden/undeclared factors at work, such as:
overloading/towing, re-used sub-standard parts, general abuse.
I know of at least one 3.7 syncro Caravelle that has done substantial mileage with its original owner, so the transmission is clearly capable of handling that 330Nm if the torque is delivered appropriately.

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