Lardy I have no idea exactly what your gearbox dilema is, but hope my experience with a rebuilt bears gearbox helps. I was trying to decide between: 6 Rib box, £600ish, but unknown condition on a 40 year old box or freeway flyer - brand new or getting mine rebuilt Here is the thread about it http://thelatebay.com/index.php?thr...ers-with-big-engines.22509/page-2#post-430087 Summary: I got bears to rebuild me a 002 gearbox, but with the 4.57 ring and pinion. I learnt from trikky2 on earlybay that it's really only the final drive that alters the overall gearing. So rather than spend loads on an unknown 6 rib, i spent more on a rebuilt one with the same final drive as a 6 rib box. Some people say a 6 rib is a stronger box than an 002, Paul at bears pointed out that gearboxes rarely break and i should only really consider that if i was absolutely hammering it - eg racing! Here is some useful information on gearbox ratios (thanks to Trikky2 again) Here is a summary of the different gearboxes out there but, as I said, its really only the final drive that changes the overall gearing. 1.6 liter and 1.7 liter 1st 3.80 2nd 2.06 3rd 1.26 4th 0.89 final drive 5.375 Overall in top 4.407 1.8 liter 1st 3.78 2nd 2.06 3rd 1.26 4th 0.89 Final drive 4.86 2 liter 1st 3.78 2nd 2.06 3rd 1.26 Top 0.88 final drive 4.57 Overall in top 4.02 Final drive ratios for all gearboxes; 95%of 1-4th gearsets are the same just the dif that changes much 1600 engine CA - 5.375 68-71 CB - 5.857 68-71 CC - 5.375 68-71 CD - 5.857 68-71 CE - 5.428 72-75 CF - 5.857 72-75 CG - 5.375 72-75 CH - 5.857 72-75 1700 engine CK - 5.375 72-73 CL - 5.375 72-73 1800 engine CM - 4.857 74-75 CN - 4.857 74-75 2000 engine CP - 4.571 76-79 CT - 4.571 76-79 1600 engine CU - 5.428 76-79 CV - 5.428 76-79 CW - 5.857 76-79 CX - 5.857 76-79 Code Engine 1st 2nd 3rd 4th Rev. Final Years CA 1600 3.80 2.06 1.26 0.82 3.61 5.375 68-71 CB 1600 3.80 2.06 1.26 0.82 3.61 5.857 68-71 CC 1600 3.80 2.06 1.26 0.82 3.61 5.375 68-71 CD 1600 3.80 2.06 1.26 0.82 3.61 5.857 68-71 CE 1600 3.80 2.06 1.26 0.82 3.80 5.428 72-75 CF 1600 3.80 2.06 1.26 0.82 3.80 5.857 72-75 CG 1600 3.80 2.06 1.26 0.82 3.80 5.375 72-75 CH 1600 3.80 2.06 1.26 0.82 3.80 5.857 72-75 CK 1700 3.80 2.06 1.26 0.82 3.80 5.375 72-73 CL 1700 3.80 2.06 1.26 0.82 3.80 5.375 72-75 CM 1800 3.80 2.06 1.26 0.89 3.80 4.857 74-75 CN 1800 3.80 2.06 1.26 0.89 3.80 4.857 72-75 CP 2000 3.78 2.06 1.26 0.88 3.28 4.571 76-79 CT 2000 3.78 2.06 1.26 0.88 3.28 4.571 76-79 CU 1600 3.78 2.06 1.26 0.82 3.28 5.428 76-79 CV 1600 3.78 2.06 1.26 0.82 3.28 5.428 76-79 CW 1600 3.78 2.06 1.26 0.82 3.28 5.857 76-79 CX 1600 3.78 2.06 1.26 0.82 3.28 5.857 76-79
I've no idea what all of this means. My van has always been a 2 litre but for some reason, at some point in its past was fitted with a CU gearbox. It seemed fine though, and ran well. I'm not sure though if it was an altered box, as there is no history from before 2001. What, if any, are the dangers / pitfalls of running a 2 litre engine with a 1600 gearbox?
Neptuneblue i doubt there are any pitfalls running a 2l engine with a 1600 gearbox. If it it drives OK i wouldn't mess about with it. People with proper technical knowledge will be along to correct me if that is wrong! My reply was for Lardy. My gearbox experience was based on my powerful engine and 1600 gearbox, i was in 4th gear by about 30mph. So i needed a new box that was better suited to the engine and that didn't run out of gears. Everyone said get a 6 rib, thay are v expensive and you have no idea what they are like inside, hence why i got rebuilt gearbox with equivalent ratio to the 6 rib. I hope that helps if its not broke then don't try to fix it!
I also don't know what it means but do see that the ratios are pretty similar til the final drives. Paul at bears told me similar that there's not a great deal if difference in the gearboxes like you said and a guy I know also said about gearboxes rarely going wrong. I don't wanna be going into fourth at 30mph so I reckon the best thing to do will be to rebuild the existing 1600 box, it'll cure the whining noise and give me the final drive I'm after. Did you change you're R&P too then? You mind me asking if the price above was the same?
Cheers Yep sorry for hijacking just interested to see if I should be worried. I don't have to change to fourth til around 40mph so quite happy it did work quite well. Great to know there's a solution if needed @Lardy
I think we are all a bit confused here and its probably my fault with the massive post ! I don't know your reasons for wanting to change the gearbox/ r&p. Are you currently happy with how it all drives? The reason for my need for new gearbox was because I'd changed the engine to a massive one, which meant the old gearbox was in 4th at 30 mph. Ish. On the motorway it was doing about 4000 rpm at 70 mph. So I got new gearbox from bears with different r&p / final drive etc, which was more suited for new engine. 3200rpm ish at 70mph now. Price the same. I got new gearbox then gave them my old one and got the surcharge I'd paid refunded. I can recommend bears for a gearbox. I have no idea if you need a new gearbox or different r&p to your current set up. I have no idea of your engine power or wheel and tyres size or driving style etc My fingers are hurting typing on my phone, so I'm out of here for now!
You're alrite fella, it's a 1600 box and a 2ltr engine, whining in drive like a pre 1930's motor and changing to 4th by 30 mph same as you had. That's the issues and just been looking to see what the best option is in regards to new or used boxes. Sounds like no the Bears option is best one really, then I can have the ratios right. Cheers for the info, it has been of help
I changed into 4th at 50 with my 3 rib box. Dunno what all this 30mph stuff is about. The ratios are different, but not so different that a 3 rib belongs in a tractor. I drove about quite happily with mine for 2 years until a 6 rib came up at the right money at a time I could afford it. Despite some being more suitable, any gearbox will do the job.
@Lardy you might find you also have not only a 3-rib box, but that they put a smaller flywheel and clutch to fit in the 3 rib bell housing and also a shorter starter motor than you'd need for a 6 rib. Your shopping list in reality might be 6 rib box 228mm flywheel 228mm clutch kit late starter motor
Likewise I'm changing into 4th at around 50mph, those changing at 30 is down to driving style not engine selection
When I get my balanced engine back in, I'll be in 3rd until 70mph+ (6-rib - it does make some difference).
