| [ Total Views: 1131 | Total Replies: 17 | Thread Id: 49678 ] |
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 Volkswagenboy
A.k.a.: Brenton Barry
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| posted on March 9th, 2006 at 10:54 PM |
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Performance Gearbox rebuild.
Hey could any of you tell me what mods I should do to my gearbox when i rebuild it so it performs better and is stronger?
Thanks a bunch.
-Staggers.
STAGGERS AUTOMOTIVE - Heavy Vehicle Diesel Specialist
JB CUSTOMS & CLASSICS - Car Builders
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oval TOFU
Son of Jim - Creator of Good
Bitte, ein Bit!
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| posted on March 9th, 2006 at 11:11 PM |
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performs better? ie: faster accelerating or better cruising RPM on the freeway?
I've read that the 3.88 final drive ratio is the strongest and gives the best fuel efficiency on the freeway due to the taller gearing..
...and Robert's ya father's brother...
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Volkswagenboy
A.k.a.: Brenton Barry
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| posted on March 9th, 2006 at 11:16 PM |
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So by reducing the ratio from 4.125 to 3.88 I'd have a higher top speed but slower 0-60mph time wouldn't I?
-Staggers.
STAGGERS AUTOMOTIVE - Heavy Vehicle Diesel Specialist
JB CUSTOMS & CLASSICS - Car Builders
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oval TOFU
Son of Jim - Creator of Good
Bitte, ein Bit!
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| posted on March 9th, 2006 at 11:18 PM |
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yeh, that's right. But ask yaself how often are you gonna go barney from the lights to drag off Nanna Beryl in her Kingswood to 100.. or 60...
Also, if you wanna fit wider wheels on ya car, use the shorter early axels.
...and Robert's ya father's brother...
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56astro
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| posted on March 9th, 2006 at 11:19 PM |
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What engine will it be mated to?
What will it be used for? cruising / street / drags / circuit / etc
What car will it be in?
What's ya budget?
VW car, VW engine ...... keepin it "real"
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oval TOFU
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| posted on March 9th, 2006 at 11:20 PM |
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I'm sure you can get custom gear ratios too. Seems like ppl usually change 3rd and 4th to something else to suit their needs (better acceleration or
higher top speed) Some even weld 3rd and 4th together, don't know why, for strength I'm presuming?
...and Robert's ya father's brother...
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Volkswagenboy
A.k.a.: Brenton Barry
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| posted on March 9th, 2006 at 11:23 PM |
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It'll be mated to a 1600TP for now, in a Superbug preferably for circuit. And budget, what should I realistically expect?
STAGGERS AUTOMOTIVE - Heavy Vehicle Diesel Specialist
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56astro
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| posted on March 9th, 2006 at 11:35 PM |
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I had a superbug tranny completely overhauled by a specialist, replaced worn parts, changed 4th gear set, all for less than $800. For a 1600 that
should be OK.
If you are wanting to compete then idealy you will want custom ratios, quality diff, etc. Then you had better have a thick wallet. A second hand LSD
alone can be over a grand!
German Autos in Brissy does heaps of trannys for off-road buggies and would be worth talking to (unless you can do the work yourself, but that
generally requires specialised tooling).
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oval TOFU
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| posted on March 9th, 2006 at 11:36 PM |
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| Quote: | Originally
posted by 56astro
I had a superbug tranny completely overhauled by a specialist, replaced worn parts, changed 4th gear set, all for less than $800.
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That's a dam good price
...and Robert's ya father's brother...
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56astro
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| posted on March 9th, 2006 at 11:40 PM |
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| Quote: | Originally
posted by oval TOFU
| Quote: | Originally
posted by 56astro
I had a superbug tranny completely overhauled by a specialist, replaced worn parts, changed 4th gear set, all for less than $800.
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That's a dam good price
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:thumb
Lawrence at German Autos is awesome.
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35MPG on 101.3kPa
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Volkswagenboy
A.k.a.: Brenton Barry
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| posted on March 10th, 2006 at 06:09 AM |
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Specialised tooling? Like a press and stuff?
-Staggers.
STAGGERS AUTOMOTIVE - Heavy Vehicle Diesel Specialist
JB CUSTOMS & CLASSICS - Car Builders
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56astro
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| posted on March 10th, 2006 at 07:16 AM |
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I don't know specifics, but I think you need special VW gauges, mandrels, drifts, blah, blah, ..........
I don't even think any old transmission shop can do VW stuff too easily. (could be wrong though)
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VWCOOL
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| posted on March 10th, 2006 at 07:22 AM |
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You need more than just a simple press! Yes they are complicated to asembl - well, not compliacted, but you need special tools and the experiecne to
use them - and there are all sorts of combos of ratios etc some of which do and do not work inside different cases and with different diffs. It's not
DIY!
There are two ratios available in gearboxes that will slip straight into your Super - one with a 4.1 diff and one with a 3.8 and contrary to popular
opinion, the overall top gear ratio is very similar BUT the 4.1 will give you better acceleration down low
A 'full house' comp VW gearbox with LSD and aftermarket ratios will cost in excess of $4K
Save your money for now and spend it elsewhere (handling, tyres, engine etc etc) Depending on what you mean by 'compete' you will be able to do
track work on second-hand gearboxes
Tricks for now are to make sure the shift-rod bush inside the pan tunnel is new and has no slop, the rubber coupling has none either, and the gearbox
'extension housing' (where the shift rod pokes out) has 100 percent zero slop - if it does, find and transplant one that doesn't
New oil and some shift improver goo is agood idea, too
[ Edited on 9-3-2006 by VWCOOL ]
Pay your debts, CxxT
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Dasdubber
A.k.a.: Alan Agyik
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| posted on March 10th, 2006 at 01:46 PM |
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I can second Lawrence's work at German Autos - he rebuilt both my swing axle box (3.88 r&p, standard ratios (1500box) but welded 3rd and 4th gears,
heavy duty (billet) side plate, super diff (threaded) etc) and my mate's IRS close ratio tranny (aftermarket 3rd and 4th (1.04 from memory), custom
super beetle mainshaft, again welded 3rd and 4th, heavy duty single side plate, super diff etc).
I brought in the super diff and side plate - from memory around AU$600 but it was a long time ago so could be wrong (this included freight from CB
Performance). Box was $800 to recondition from memory. Very happy thus far!
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hanktheplank
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| posted on March 10th, 2006 at 02:42 PM |
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Our 61 ghia needs to have the box rebuilt.........It is linked to a 1600, so assume it isnt the original box?
Any ways, everyone in Melbourne has quoted me $1600+ for a rebuild on it (including the $300-350) to swap it out..........Anyone know where I can drop
a tranny off in Melbourne and have it done for $800?
Cheers,
JRW
61 Karmann Ghia - "Audrey"
76 Kombi, Sopru Conversion - "Bob"
68 Wife - "DS-W"
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56astro
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| posted on March 10th, 2006 at 04:07 PM |
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Get a quote to freight it to Brisbane
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35MPG on 101.3kPa
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 Bizarre
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| posted on March 10th, 2006 at 04:16 PM |
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or buy a 2nd hand one in Bris and get them to rebuild that and only pay to ship down
Them you have a spare to boot - or sell and recoop some costs.
I am sure some one would have one up there - may be give Buggy Brad a call??
Futue te ipsum!!!
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 helbus
A.k.a.: Pete S
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| posted on March 10th, 2006 at 05:04 PM |
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Volkwerke In Greensborough have a very good name for building VW Transaxles. We got out 2 litre kombi box done there and I am very happy with it. I
dropped the box in to them and fitted the rebuilt box myself. Worth a call maybe?
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