What gear box fit's? and Final drives??

[scott.parker]

Right i have a 20XE with F20, whats the FD in it, and what other boxes out there will fit that have a closer ratio, and whats the Final drives of them?

As Ive got a plan..

Cheers, Scott

[MK999]

As Ive got a plan..

Is it as cunning as a fox what used to be Professor of Cunning at Oxford University but has moved on and is now working for the U.N. at the High Commission of International Cunning Planning?

on topic: any big block clusters should fit I'd imagine? as f10/f13 etc ones are swappable afaik? tbh I just wanted to post the blackadder quote though, so someone will need to back me up lol

[Stuart]

F16 and F20 clusters arent a direct swap due to a bearing :( we found that out when doing mr tunnnnnnicliffes quaife

[MattBrown]

So I have read, theyre a tw4t to change due to bearing, and shaft sizes somewhere lol

Can't you put an f16cr on?

Or the FD from an f16CR into the F20box?

Or, get a custom diff ring and pinion from quaiffe, £250IIRC

[craig green]

Scott the FD's will vary depending where the box originated from. Astra or Calibra etc...

[GRUNT 16V]

Astra gte 16v = f20 3.55 fd
Astra gte 8v = f16 3.72 fd
astra Gsi 16v = f20 3.42 fd
calibra 16v rt = f20 3.55 fd
cav gsi 16v = f20 3.42 fd
cav gsi 4x4 na = f20 3.72 fd
cav/cali turbo 4x4 = f28 3.72 fd
hope this helps

[Andy]

An F20 cluster will not fit an F16 as a straight swap or vice versa

[Mazz]

As Craig said, there are 3 different types of F20. The internals of those are inter-changeable, but iirc you have to swop the diff/diff gear too..

[alan b]

fit a whole f16 cr. i dont no my fd but im hitting the limiter in 5th at 134 its pretty close.

[Nova_Tek]

As above, three types of F20. All three have the same 1 - 4 gear ratio's just the fifth/final drive that's different.

[richardt]

[quote=MK999]Is it as cunning as a fox what used to be Professor of Cunning at Oxford University but has moved on and is now working for the U.N. at the High Commission of International Cunning Planning?

haha, worth it

[scott.parker]

Astra gte 16v = f20 3.55 fd
Astra gte 8v = f16 3.72 fd
astra Gsi 16v = f20 3.42 fd
calibra 16v rt = f20 3.55 fd
cav gsi 16v = f20 3.42 fd
cav gsi 4x4 na = f20 3.72 fd
cav/cali turbo 4x4 = f28 3.72 fd
hope this helps

Most useful thing so far.. So at present i have a F20 with 3.55fd in it, so can i straight swap to a GSi cav with 3.72 fd? and use my quaife??

Or if there is any after market stuff out there who does anything close to 4.1-4.4 fd?

Scott

[alan b]

you can get quiafe crown wheel and pinion they do 4.5 4.8 etc
http://www.hh-ms.com/database/index.php?SelCategoryID=5&SelModelID=1&SelSubCategoryID=38