transaxle question
- Thread starter Joz
- Start date
<o:smarttagtype namespaceuri="urn:schemas-microsoft-com<img src=" http:="" www.gt40s.com="" forum="" images="" smilies="" redface.gif="" border="0" alt="" title="Embarrassment" smilieid="2" class="inlineimg"></o:smarttagtype>UN5 is from a Renault Master van. Stock ratios are too low for a GT40.
1st = 4.455 (11x49)
2nd = 2.438 (16x39)
3rd = 1.480 (25x37)
4th = 1.037 (27x28)
5th = 9.868 (38x33)
Final = 5.857 (7x41)
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Aftermarket replacement gears are however made in <st1:country-region w:st="on"><st1
lace w:st="on">Australia</st1lace></st1:country-region>.<o></o>
A 3.44 final is available along with the following:<o></o>
1st & 2nd: (3.36 & 2.38<u1></u1><u2></u2>), (3.36 & 2.06<u1></u1><u2></u2>). (3.00 & 2.06<u1></u1><u2></u2>), (3.00 & 2.00<u1></u1><u2></u2>), (2.77 & 2.00)<o></o>
<o> </o>
3rd: 1.85, 1.76, 1.67, 165, 1.53<o></o>
<o> </o>
4th: 1.62, 1.45, 1.39, 1.33
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5th: 1.40, 1.29, 1.18, 1.13, 1.08, 0.96, 0.92<o></o>
<o> </o>
Between the stock and custom gears that are available, you could build a suitable close ratio gearbox from a UN5.<o></o>
<o> </o>
The issue would be the cost. <o></o>
<o> </o>
The last quote I received for gears were as follows (In Australia dollars):<o></o>
Final = 2400, 1st & 2nd = 1980, 3rd = 670, 4th = 670, 5th = 715<o></o>
<o> </o>
If you changed all the gears, it would cost 6435 AUD which is about 5600 USD.<o></o>
<o> </o>
They can also make a one piece input shaft instead of the standard (weaker) original design. More $$$$$<o></o>
<o> </o>
Custom ratio gears can also be made for the UN1.<o></o>
<o> </o>
Discounts were available for multiple sets.<o></o>
<o> </o>
An advantage of the UN5 is that the differential has 4 spider gears where as many of the UN1’s had only 2.<o></o>
<o> </o>
The aftermarket gears are also supposed to be of superior material and strength as compared to the originals. <o></o>
<o> </o>
You could build a very strong and suitable gearbox from a UN5. But would it be worth the price you would have to pay?<o></o>
1st = 4.455 (11x49)
2nd = 2.438 (16x39)
3rd = 1.480 (25x37)
4th = 1.037 (27x28)
5th = 9.868 (38x33)
Final = 5.857 (7x41)
<!--[if !supportLineBreakNewLine]-->
Aftermarket replacement gears are however made in <st1:country-region w:st="on"><st1
lace w:st="on">Australia</st1lace></st1:country-region>.<o></o>A 3.44 final is available along with the following:<o
></o>1st & 2nd: (3.36 & 2.38<u1
></u1><u2></u2>), (3.36 & 2.06<u1></u1><u2></u2>). (3.00 & 2.06<u1></u1><u2></u2>), (3.00 & 2.00<u1></u1><u2></u2>), (2.77 & 2.00)<o></o><o
> </o>3rd: 1.85, 1.76, 1.67, 165, 1.53<o
></o><o
> </o>4th: 1.62, 1.45, 1.39, 1.33
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5th: 1.40, 1.29, 1.18, 1.13, 1.08, 0.96, 0.92<o
></o><o
> </o>Between the stock and custom gears that are available, you could build a suitable close ratio gearbox from a UN5.<o
></o><o
> </o>The issue would be the cost. <o
></o><o
> </o>The last quote I received for gears were as follows (In Australia dollars):<o
></o>Final = 2400, 1st & 2nd = 1980, 3rd = 670, 4th = 670, 5th = 715<o
></o><o
> </o>If you changed all the gears, it would cost 6435 AUD which is about 5600 USD.<o
></o><o
> </o>They can also make a one piece input shaft instead of the standard (weaker) original design. More $$$$$<o
></o><o
> </o>Custom ratio gears can also be made for the UN1.<o
></o><o
> </o>Discounts were available for multiple sets.<o
></o><o
> </o>An advantage of the UN5 is that the differential has 4 spider gears where as many of the UN1’s had only 2.<o
></o><o
> </o>The aftermarket gears are also supposed to be of superior material and strength as compared to the originals. <o
></o><o
> </o>You could build a very strong and suitable gearbox from a UN5. But would it be worth the price you would have to pay?<o
></o>UN1-021 available in the UK. It says that it comes with 3.44 final instead of the 3.89 that came stock in the UN1-021. I would verify this. Also comes with 302 adapter and he is willing to ship to the USA.
RENAULT 5 SPEED TRANSAXLE GEARBOX with FORD 302 Adaptor - eBay (item 170386572442 end time Oct-03-09 15:28:34 PDT)
The Renault UN1 gearboxes still turn up often in Europe, but are difficult to find in the USA. The Vixen RV and the Lotus are the only USA vehicles that I know of that came with a genuine UN1.
The 369 used in the Delorean is nearly identical to the UN1 and comes with a 3.44 final. A Delorean gearbox would have to be taken apart to have the ring gear flipped as it is set up for a rear engine configuration. They are still available new from DMC for about $3k.
RENAULT 5 SPEED TRANSAXLE GEARBOX with FORD 302 Adaptor - eBay (item 170386572442 end time Oct-03-09 15:28:34 PDT)
The Renault UN1 gearboxes still turn up often in Europe, but are difficult to find in the USA. The Vixen RV and the Lotus are the only USA vehicles that I know of that came with a genuine UN1.
The 369 used in the Delorean is nearly identical to the UN1 and comes with a 3.44 final. A Delorean gearbox would have to be taken apart to have the ring gear flipped as it is set up for a rear engine configuration. They are still available new from DMC for about $3k.
