Reverse not engaging

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wammers said:
Clutch B is used for forward gears and they all work. Only clutch that is exclusive to reverse is D, it would be my guess that is the one that has failed.
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clutch b is used in R as well as 3 and 4 but not 1 and 2 ,clutch d is used for reverse as well as clutch b ,clutch d would loose engine breaking in 1 as a test ,but rarely slip,burn out in my experience ,where clutch A and or B do often ,a clutch can slip in" take up of drive "as in R or D but may not be so noticeable once car is moving,there is no gear that operates from one clutch
 
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james1992 said:
Yeah i bought a 24 as it was £100 and 20 miles away. So i thought it was worth a go
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OK your choice but there is a lot of bull**** talked about the HP22 failing on the diesel. Diesel 136 BHP and 268 Nm of torque. 4.0 litre petrol 190 BHP and 320 Nm of torque. Both use the same gearbox. Even if you fit a powerbox you will only get 165 BHP and 319 Nm of torque. So you are 25 BHP down on a standard petrol. But with around the same torque. Boxes do fail, but in my view that is more down to crap maintenance or towing the Houses of Parliament around all the time than anything else.
 
wammers said:
OK your choice but there is a lot of bull**** talked about the HP22 failing on the diesel. Diesel 136 BHP and 268 Nm of torque. 4.0 litre petrol 190 BHP and 320 Nm of torque. Both use the same gearbox. Even if you fit a powerbox you will only get 165 BHP and 319 Nm of torque. So you are 25 BHP down on a standard petrol. But with around the same torque. Boxes do fail, but in my view that is more down to crap maintenance that anything else.
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diesels do seem to be harsher on the box
 
wammers said:
OK your choice but there is a lot of bull**** talked about the HP22 failing on the diesel. Diesel 136 BHP and 268 Nm of torque. 4.0 litre petrol 190 BHP and 320 Nm of torque. Both use the same gearbox. Even if you fit a powerbox you will only get 165 BHP and 319 Nm of torque. So you are 25 BHP down on a standard petrol. But with around the same torque. Boxes do fail, but in my view that is more down to crap maintenance or towing the Houses of Parliament around all the time than anything else.
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They come on here for help and still do it there way:rolleyes:
 
jamesmartin said:
clutch b is used in R as well as 3 and 4 but not 1 and 2 ,clutch d is used for reverse as well as clutch b ,clutch d would loose engine breaking in 1 as a test ,but rarely slip,burn out in my experience ,where clutch A and or B do often ,a clutch can slip in" take up of drive "as in R or D but may not be so noticeable once car is moving,there is no gear that operates from one clutch
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Yes i know that James, there are three clutches involved with reverse. D is the only one that is NOT used for any other gear. You maybe correct and B has gone but does just enough to give drive when car is moving. Whatever is wrong with his box it is not very well think that is obvious.
 
wammers said:
Yes i know that James, there are three clutches involved with reverse. D is the only one that is NOT used for any other gear. You maybe correct and B has gone but does just enough to give drive when car is moving. Whatever is wrong with his box it is not very well think that is obvious.
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Yeah i got the 24 box as i am just going to try and fit it. I do understand what you said about the 22 box but it was just the closest box was over 200 miles away and i cudnt afford to have it delivered
 
james1992 said:
Yeah i got the 24 box as i am just going to try and fit it. I do understand what you said about the 22 box but it was just the closest box was over 200 miles away and i cudnt afford to have it delivered
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You will have to change bell housing and use your old torque converter think you may have to swap the oil pumps over. James M will know more about it than i do.
 
UPDATE!!!!
Ranger rover fixed now changed the gearbox to zf4hp24. Took abit of head scratching when the oil pumps turned out to be different but managed to swap my old one over and in to the new gearbox so now i have a ranger rover thats reverses and drives forward.
Thanks for the help and advice people
 
james1992 said:
UPDATE!!!!
Ranger rover fixed now changed the gearbox to zf4hp24. Took abit of head scratching when the oil pumps turned out to be different but managed to swap my old one over and in to the new gearbox so now i have a ranger rover thats reverses and drives forward.
Thanks for the help and advice people
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That's good news and interesting that the pumps were different, my info was that they were the same.:)
 
Datatek said:
That's good news and interesting that the pumps were different, my info was that they were the same.:)
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My new v8 gear box was 63 on the seriel number which i believe there was abit more to swap than gearboxes number 65 or after. but its looking good just hoping i am on to a winner now :D. Just got the blowers to sort as they are not blowing at all and the digital panel says check manual :confused:
Always something to do
 
wammers said:
Different torque convertor drive Keith.
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Yeah it is to do with the torque convertor drive as the hp24 was longer than the 22 so i swapped the splined pole that goes into torque convertor but oil pump had to be swapped too:confused: that was the head scratcher at first due to needing to change the oil pump spacer where the bell housing bolts on it
 
Sold this on as heaters started playing up and working even swapped electronic units to no avail. One thing i will say about swapping the gearbox for the 4.6 v8 one is the ratio are longer and the diesel in standard map isnt really powerful enough to really use the gearbox might work with a remap though. Have bought a td5 discovery now and love driving especially as its a manual
 
james1992 said:
Sold this on as heaters started playing up and working even swapped electronic units to no avail. One thing i will say about swapping the gearbox for the 4.6 v8 one is the ratio are longer and the diesel in standard map isnt really powerful enough to really use the gearbox might work with a remap though. Have bought a td5 discovery now and love driving especially as its a manual
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According to ZF the ratios are the same. Several others have done the conversion with no comment on the ratios, only the clutches are different.
 
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