4722 replies to this topic

[chris_uk]

Will it not just be a standard 2.2 box with a 3.95 F/D, the standard VXT is a 3.84 F/D, and i cant imagine is a 4.17 F/D or 4.41 F/D

[Nev]

Before dis-information from the usual source (chris_uk) leads to a misunderstanding, here is the info I gleaned from a German Opel source.

 

I have added some cells that compare gear ratios and the Vmax between my old 3.632 FD box and my new 3.947 FD box. Bear in mind the Vmax figures are for my specific car, where my rear wheels rolling circumference are slightly larger than OEM and my max RPM is 8000. MPH values are GPS measured (as opposed to speedo figures).

 

Hopefully this will eliminate incorrect info from circulating. All in all I have found it suits my car really well indeed, better than anticipated, but I expect that is mainly due to my extended rev range. I'm not sure how it would feel on an OEM VX220 turbo that runs out of puff by 5500 RPM; you might find yourself constantly having to change gear.

 

 

Edited by Nev, 02 August 2019 - 05:50 AM.

[Rosssco]

Nev, presume you used your existing SRT gearing and swapped in a 3.95 final drive? 

 

Do you know where the 5th gear set on the F23 is? On many transverse gearboxes / transmissions, its the last gear set at the opposite of the side of the bell-housing (accessible from the end plate). 

 

Wondering how feasible to add a longer 5th gear (from a WR ratio box - 0.686) to an existing SR or SRT arrangement..

Edited by Rosssco, 02 August 2019 - 07:18 AM.

[siztenboots]

Nev, presume you used your existing SRT gearing and swapped in a 3.95 final drive? 

 

Do you know where the 5th gear set on the F23 is? On many transverse gearboxes / transmissions, its the last gear set at the opposite of the side of the bell-housing (accessible from the end plate). 

 

Wondering how feasible to add a longer 5th gear (from a WR ratio box - 0.686) to an existing SR or SRT arrangement..

 

 

details here

 

http://www.vx220.org...ions/?p=1067697

[Nev]

Nev, presume you used your existing SRT gearing and swapped in a 3.95 final drive? 

 

Do you know where the 5th gear set on the F23 is? On many transverse gearboxes / transmissions, its the last gear set at the opposite of the side of the bell-housing (accessible from the end plate). 

 

Wondering how feasible to add a longer 5th gear (from a WR ratio box - 0.686) to an existing SR or SRT arrangement..

 

I didn't do anything fancy, just plonked the donor Zafira gearbox straight on to my engine (i.e. I didn't open it up).

 

When I was looking around on the internet, there was some conflicting info on the 5th gear ratios (SRT vs others). In the end, I am not entirely sure which one I got. Based on the 150 miles I did yesterday with the new box, I need approx 2950 RPM for 5th gear @ 70 MPH (speedo indicated) using a 285mm x 30% profile rear tyre (down to 2mm of tread) - you could use that to extrapolate the 5th gear ratio from that if you want.

 

Sizten's link looks useful for you. Also, Vocky knows a lot if I remember.

 

Edited by Nev, 02 August 2019 - 07:53 AM.

[chris_uk]

Before dis-information from the usual source (chris_uk) leads to a misunderstanding

I got my information from here https://en.m.wikiped...23_transmission

[ditonics]

VECTRA GEARBOXES

4.17 RATIO 16LZ2,20NEJ,C20SEL,X20XVE 90578385 7 00 032 (IDENT SQ)

3.74 RATIO C20SEL,X20XEV,C22SEL 90578390 7 00 037 (IDENT SR)

3.95 RATIO C20SEL,X20XEV 90578386 7 00 033 (IDENT SS)

3.74 RATIO C20SEL,X20XEV, YL000001 - 90578390 7 00 037 (IDENT SR)
(FOR VEHICLES WITH C22SEL PLANT CODE L)

3.95 RATIO Z22SE 90578392 7 00 092 (IDENT ST)

3.84 RATIO X25XE,Y26SE 90578391 7 00 038 (IDENT SK) 

3.84 RATIO X20DTL,X20DTH,Y20DTH 90578387 7 00 034 (IDENT SL) 

3.95 RATIO X20DTL 90578388 7 00 035 (IDENT SM) 

3.74 RATIO X20DTH,Y20DTH 90578389 7 00 036 (IDENT SP) 



ASTRA G GEARBOXES

TRANSMISSION,ASSY.,3.95 RATIO X20XEV 90578397 7 00 051 (IDENT SC)
(EXCEPT OPC) (ALSO USE 90470781 7 24 632)

TRANSMISSION,ASSY.,3.95 RATIO X20XER 24426557 7 00 090 (IDENT TS)
(FOR OPC) (ALSO USE 90470781 7 24 632) 

TRANSMISSION,ASSY.,3.74 RATIO X20XEV 90578400 7 00 052 (IDENT SH)
(ALSO USE 90470781 7 24 632)

TRANSMISSION,ASSY., 4.17 RATIO X20XEV 5 DOOR HATCH 9126007 7 00 088 (IDENT SD)
(FOR SOUTH AFRICA) F48
(ALSO USE 90470781 7 24 632)

TRANSMISSION,ASSY., 3.63 RATIO Z20LET COUPE F07 90424091 7 00 091 (IDENT TR) 

TRANSMISSION,ASSY., 3.63 RATIO Z20LET COUPE F07 90424091 7 00 091 (IDENT TR)
(NLS.- USE 24451449 7 00 220 AND SUPPLY 90470781 7 24 632)

TRANSMISSION,ASSY., 3.63 RATIO Z20LET 24451449 7 00 220 (IDENT AF)

TRANSMISSION,ASSY., 3.95 RATIO Z20LET MONOCAB F75 24461371 7 00 175 (IDENT DZ)
(ALSO USE 90470781 7 24 632) 

TRANSMISSION,ASSY., 3.95 RATIO Z22SE HATCH,SALOON, 90578402 7 00 053 (IDENT SF) 
(ALSO USE COUPE,ESTATE,VAN 90470781 7 24 632) F07,F08,F35,F48,F69,F70

TRANSMISSION,ASSY., 4.17 RATIO Z22SE MONOCAB F75 9126008 7 00 089 (IDENT SG)
(ALSO USE 90470781 7 24 632)

TRANSMISSION,ASSY., 3.63 RATIO Y20DTH HATCH,SALOON, 9126006 7 00 050 (IDENT SB)
(ALSO USE 90470781 7 24 632) ESTATE,VAN F08,F35, F48,F69,F70 


TRANSMISSION,ASSY., 3.84 RATIO X20DTL HATCH,SALOON, 90578398 7 00 029 (IDENT SA)
(ALSO USE 90470781 7 24 632) ESTATE,VAN F08,F35, F48,F69,F70 

TRANSMISSION,ASSY., 4.17 RATIO X20DTL MONOCAB F75 90578403 7 00 030 (IDENT SJ)
(ALSO USE 90470781 7 24 632)

TRANSMISSION,ASSY., 4.17 RATIO Y20DTH MONOCAB F75 90578403 7 00 030 (IDENT SJ)
(ALSO USE 90470781 7 24 632)

TRANSMISSION,ASSY., 4.17 RATIO MONOCAB F75 24451455 7 00 844 (IDENT AR) 

 

 

[ditonics]

AF is the identity on a stock VXT gearbox.

 

Its the close ratio version.

 

The F23 comes in close and wide ratio with differing F/D and bell housings. 

 

Hope some of the info helps

Edited by ditonics, 02 August 2019 - 09:03 AM.

[vocky]

I always use this website for gear ratios - https://www.opel-inf...triebe/f23.html

 

As I've always said, if I could only do one mod to a vx220 it would be to change the gearbox

 

My own NA, which has a close ratio M32 box, accelerates as quick as a 300bhp SC with a 4.17 box

[Rosssco]

 

Nev, presume you used your existing SRT gearing and swapped in a 3.95 final drive? 

 

Do you know where the 5th gear set on the F23 is? On many transverse gearboxes / transmissions, its the last gear set at the opposite of the side of the bell-housing (accessible from the end plate). 

 

Wondering how feasible to add a longer 5th gear (from a WR ratio box - 0.686) to an existing SR or SRT arrangement..

 

 

details here

 

http://www.vx220.org...ions/?p=1067697

 

 

Cheers - looks like changing the 5th ratio along is not possible unless you strip and rebuild..

[ditonics]

I couldn't find the link to the German site. That's the best one by far for gearbox info.

Vocky do you find 1st of any use with a 4.17? The f23 is kind of limited unfortunately. If you go for a lower fd 1st becomes a waste of space and a higher fd makes 5th a waste even with the so called closer ratio box. I'd love a longer first and then closer ratios.... Keep thinking M23 with big bearings and cooler is the only way.

I've been toying with swapping my gearbox for similar reasons to Nev. I have never needed 5th on track, the shift point is about 155 which is bonkers.

[Rosssco]

I've been toying with swapping my gearbox for similar reasons to Nev. I have never needed 5th on track, the shift point is about 155 which is bonkers.

 
Sounds like the 3.74 or 3.95 ratios are a cheap worth while upgrade (if you can DIY it) for turbo owners, just like the 4.17 is for NA / SC peeps..

[chris_uk]

I couldn't find the link to the German site. That's the best one by far for gearbox info.

Vocky do you find 1st of any use with a 4.17? The f23 is kind of limited unfortunately. If you go for a lower fd 1st becomes a waste of space and a higher fd makes 5th a waste even with the so called closer ratio box. I'd love a longer first and then closer ratios.... Keep thinking M23 with big bearings and cooler is the only way.

I've been toying with swapping my gearbox for similar reasons to Nev. I have never needed 5th on track, the shift point is about 155 which is bonkers.

I was actually surprised how useful first still was with the 4.17, still use it just like i normally did with the 3.95.

[siztenboots]

don't forget to include the costs for workshop to swap the gearbox , which for many will mean rear clam off  . Plus you would be probably thinking about changing slave cylinder , inspect friction material at the same time.

 

[chris_uk]

Re-using old slave cylinders is a recipe for disaster. A friend reused a not so old one and it lasted 100 miles..

[Nev]

Early morning shot from my drive out to the Irish Sea (Aberystwyth).

 

275 miles of pure fun getting there with no traffic, not so much fun coming back later with tons of traffic.

 

[Nev]

I'm starting to quite like the washed look, might even get round to washing him a bit more often. Must be a middle aged thing.

[Ormes]

I'm starting to quite like the washed look, might even get round to washing him a bit more often. Must be a middle aged thing.

 

[oakmere]

Great pic
Hope the hand brake was securely on 😆

[Nev]

Great pic
Hope the hand brake was securely on 😆

 

Thanks, it was in gear as well. A couple more pics:

 

 

 

 

Edited by Nev, 04 August 2019 - 06:04 PM.