Gearbox Guru

Hessy Hymer

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Subject:

Gearbox Guru

 ·  Posted: 14.05.2022  ·  #1

On way back from the NW200 - Hessys' gearbox really didnt like 5th, then driving home in 4th - got her parked and the selector wont allow any gear to be attained?
We need a gearbox mechanic - who is recommended north of the bann ideally
thanks so much
Fergal

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sprinter

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Subject:

Gearbox Guru

 ·  Posted: 14.05.2022  ·  #2

Without going to the Guru, have your regular mechanic, drop the oil and measure how much was in there, refill it with 3ltrs of oil.
On some of these gearbox the 5gear was an add on, and Fiat never admitted that it needed more oil than the 4 geared unit.
It's worth a try.

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Ron W

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Subject:

Re: Gearbox Guru

 ·  Posted: 15.05.2022  ·  #3

Gardiner transmission Cullybackey

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Albert the Talbot

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Subject:

Re: Gearbox Guru

 ·  Posted: 16.05.2022  ·  #4

Having owned a couple of vans the same era as your I would firstly check all engine/gearbox mounts

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Hessy Hymer

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Subject:

Re: Gearbox Guru

 ·  Posted: 18.05.2022  ·  #5

Good (ish news) - Sprinter - we put new oil in and got it running gears 1 to 4 with reverse, 5 in driving forward not feasible - awful sound. However from neutral to 5 it shifts fine with engine turning.
So now from 4 th to 5th - is that the synchronisation thingy me gingy?

Thinking now Gardiners although they say they may have to web search for hens teeth:-)
Thanks so much educated mindful craicers!!!!

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JJF

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Subject:

Re: Gearbox Guru

 ·  Posted: 18.05.2022  ·  #6

The 5th gear Baulk ring is worn or cracked. I think 3rd / 4th & 5th gear Baulk rings are the same.
Get gearbox code (alloy tag at diff casing) and available on ebay.co.uk from a Latvian dealer. I’ve got them before.

Fill gearbox to level at bung and add at least 500ml additional oil.

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Hessy Hymer

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Re: Gearbox Guru

 ·  Posted: 22.05.2022  ·  #7

JJF - wow - thanks so much !!!
Might i ask where might i obtain the gearbox code from - it probably would be casted on the gearbox somewhere - wouldnt it?
Awaiting the mechanic to free space in his yard to get it stripped out and up the road - it would be great to get this part underway as well
thanks again everyone!!!

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eirebus

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Subject:

Re: Gearbox Guru

 ·  Posted: 22.05.2022  ·  #8

Quote by JJF

Get gearbox code (alloy tag at diff casing) and available on ebay.co.uk from a Latvian dealer. I’ve got them before.

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Hessy Hymer

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Subject:

Re: Gearbox Guru

 ·  Posted: 22.05.2022  ·  #9

Sleepy eyes on me this morning - cheers eirebus:-)

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sprinter

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Subject:

Gearbox Guru

 ·  Posted: 22.05.2022  ·  #10

Quote by Hessy Hymer

Good (ish news) - Sprinter - we put new oil in and got it running gears 1 to 4 with reverse, 5 in driving forward not feasible - awful sound. However from neutral to 5 it shifts fine with engine turning.
So now from 4 th to 5th - is that the synchronisation thingy me gingy?

For ref, how much and what grade of oil did he put into the gearbox?

Like JJF said, I think you need to go to country's where they still fix cars, to source spares, nowadays,
Also anyone with the same box fitted, should do the oil change, and note his other bit af advise,
"Fill gearbox to level at bung and add at least 500ml additional oil."

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Hessy Hymer

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Subject:

Re: Gearbox Guru

 ·  Posted: 22.05.2022  ·  #11

im using SX75/90 GL- 4 gearbox oil that i got from GSF in boucher.
Yes i agree with the overfilling - couldnt believe that i had forgot to check the oil level before the run up to NW
wont be happening again when its sorted:-)
cheers all

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Hessy Hymer

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Subject:

Re: Gearbox Guru

 ·  Posted: 09.06.2022  ·  #12

Paul of Gardiners in Cullybackey opened her up and the 5th gear is shattered!
Taken 2 week to get one from central europe - awaiting it to be installed and then allow the garage to get her off their ramps.
Totally embarrassed that the time taken with the delays on the garage .
Pray thats it all - halfords good offers on their gear oil currently!

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Ally

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Subject:

Re: Gearbox Guru

 ·  Posted: 09.06.2022  ·  #13

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JJF

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Re: Gearbox Guru

 ·  Posted: 09.06.2022  ·  #14

Consider fitting the lower 34/53 ratio 5th gear and synchro if you’re changing the entire assembly. There is 2 options, the standard gearing or the optional lower ratio gears.
Makes a vast difference to the pulling ability in 5th.

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mad max

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Subject:

Re: Gearbox Guru

 ·  Posted: 09.06.2022  ·  #15

Quote by JJF

Consider fitting the lower 34/53 ratio 5th gear and synchro if you’re changing the entire assembly. There is 2 options, the standard gearing or the optional lower ratio gears.
Makes a vast difference to the pulling ability in 5th.

And there is me trying to get a higher 5th as my 2.8 is roaring in 5th at 60mph sitting at 2600rpm.
Plenty of torque to handle the higher 5th

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panda

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Subject:

Re: Gearbox Guru

 ·  Posted: 09.06.2022  ·  #16

Quote by JJF

Consider fitting the lower 34/53 ratio 5th gear and synchro if you’re changing the entire assembly. There is 2 options, the standard gearing or the optional lower ratio gears.
Makes a vast difference to the pulling ability in 5th.

That's what i did on my 99 Adria....made a huge difference for the better... 5th gear felt and pulled so much better...no dropping gears on hills like before.... brilliant upgrade k_hand:

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Hessy Hymer

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Subject:

Re: Gearbox Guru

 ·  Posted: 09.06.2022  ·  #17

Didnt know it was possible- i got the 45/53 which was on her before - thank you anyway.
If anyone knows Paul in Gardiners - could you put a word in for me please!
thanks a million

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Hessy Hymer

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My Motorhome: 1992 Hymer B534
Base Vehicle: Ducato 2.5TD

Subject:

Re: Gearbox Guru

 ·  Posted: 14.06.2022  ·  #18

Gearbox refurbed - new bearings and 5th gear mechanism. New Clutch also may as well as they are elbows deep - so its now with the mechanics - hopefully back on the road this weekend. Thanks for all your help Craicers!

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