HELP FAST is this right?

HULK · May 5th, 2009, 15:40

i am going to buy a second hand gearbox for my 1995 850 T-5R
i think mine is the 50-42LE

please can somebody that no,s for a fact confirm this as i am looking at one to buy now on ebay and i need to no for defo if its the gearbox i need before i buy it.

this is the one i will buy if it defo is the right one

http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=160312442766

HULK · May 5th, 2009, 16:07

have just been told there is a diferance in the aw50-42le in where the speed sensor is on the gearbox in the early and late models made in 1995.
how do i no witch one mine is?

ok i have been told that the one on ebay is the later model one with the speed sensor on the top of the gearbox. i have lifted up my airbox and taken a pic. is this my speed sensor and so does that mean mine is the later model with it on the top?

norfolkboy · May 5th, 2009, 16:49

What you are looking at there I think you'll find is the engine speed sensor. The vehicle speed sensor is further round the back of the box going down on 1996 model year. On earlier ones it is even further down the back towards the diff. Look at the Diagram in the 850 technical section under auto trans diagnosis-AW50-42LE

Chris_Rogers · May 5th, 2009, 16:53

Don't forget that not all AW50-42 gearboxes are the same.

Apart from the difference with the speed sensor, the gear ratios are different between models.

You need to match the Volvo part number.

HULK · May 5th, 2009, 16:55

oh right so its not the engine speed sensor hes on about its the vehicle speed sensor that changed in the 1995 models?

dooby · May 5th, 2009, 16:59

EDIT crossed posts with several people. Can't remember if there was another sensor further back on mine, and if so how far back. Can maybe check tonight.

Hi,

I *think* that is the speed sensor, and it's like my '97 box - on the top.

HTH, Pete

HULK · May 5th, 2009, 17:02

Quote:

Originally Posted by Chris_Rogers

Don't forget that not all AW50-42 gearboxes are the same.

Apart from the difference with the speed sensor, the gear ratios are different between models.

You need to match the Volvo part number.

what? oh for god sake this is getting silly now.

witch number on the gearbox is the part no.?

mine says

50-42LE 1208
560
95 B W 86479

so do i need to match the
1208
560
and
the 95 B W 86479?

HULK · May 5th, 2009, 17:29

ok have just taken a pic of where the vehicle speed sensor would be on a later model and i can tell if there is one there or not as there is a black plastic thing that carries loads of wires going over the spot where it would be so cant tell if its under there. in the pic bellow

ok so do i need to match the part no. on my gearbox as there are diferant ratios?

this is totaly cofusing me now.
started of thinking i just need an aw50-42le

now its got all complicated.

aaaaaaahhhhhhh what gearbox do i need??????????

norfolkboy · May 5th, 2009, 17:52

Basically the type of autotransmission is an AW50-42LE. You then have different final drive ratios depending upon the model of 850 it is fitted to. These are as follows B5252S (2435cc 10 valve) 2.74:1, B5204S (1984cc 20 valve) 3.16:1, B5254S ( 2435cc 20 valve) 2.74:1 and finally B5234T ( 2319cc 20 valve Turbo) 2.54:1. You really have to get a box from the same model as yours . Fit the wrong one and you will either have rapid acceleration and no top speed or rubbish acceleration but you would eventually get up to an extremely high top speed.

HULK · May 5th, 2009, 18:00

Quote:

Originally Posted by norfolkboy

Basically the type of autotransmission is an AW50-42LE. You then have different final drive ratios depending upon the model of 850 it is fitted to. These are as follows B5252S (2435cc 10 valve) 2.74:1, B5204S (1984cc 20 valve) 3.16:1, B5254S ( 2435cc 20 valve) 2.74:1 and finally B5234T ( 2319cc 20 valve Turbo) 2.54:1. You really have to get a box from the same model as yours . Fit the wrong one and you will either have rapid acceleration and no top speed or rubbish acceleration but you would eventually get up to an extremely high top speed.

ooow ooow i want the rapic ecceleration one LOL.

so basicly i need a aw50-42le that is from an 850 T-5 and now i just need to find out where my vehicle speed sensor is.
great cheers.

anybody no weather i have the speed sensor on the top or bottom from my part number?

May 5th, 2009, 15:40	#1
HULK 850 T-5 for sale Last Online: Oct 17th, 2009 22:57 Join Date: Jan 2009 Location: dunstable	HELP FAST is this right? i am going to buy a second hand gearbox for my 1995 850 T-5R i think mine is the 50-42LE please can somebody that no,s for a fact confirm this as i am looking at one to buy now on ebay and i need to no for defo if its the gearbox i need before i buy it. this is the one i will buy if it defo is the right one http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=160312442766

May 5th, 2009, 16:07	#2
HULK 850 T-5 for sale Last Online: Oct 17th, 2009 22:57 Join Date: Jan 2009 Location: dunstable	have just been told there is a diferance in the aw50-42le in where the speed sensor is on the gearbox in the early and late models made in 1995. how do i no witch one mine is? ok i have been told that the one on ebay is the later model one with the speed sensor on the top of the gearbox. i have lifted up my airbox and taken a pic. is this my speed sensor and so does that mean mine is the later model with it on the top? Last edited by HULK; May 5th, 2009 at 16:39.

May 5th, 2009, 16:59	#6
dooby Forum Support Team Last Online: Jul 5th, 2019 16:11 Join Date: Mar 2006 Location: Cambridge View Photos By: dooby	EDIT crossed posts with several people. Can't remember if there was another sensor further back on mine, and if so how far back. Can maybe check tonight. Hi, I think that is the speed sensor, and it's like my '97 box - on the top. HTH, Pete __________________ '97MY black 855R M56H + Quaife Porsche/S60R BBK + XP8s, TD04HL-19T, 17"x8J Pegasus, THS intercooler, custom intake & RIP, Samco coolant, Koni/Nivo H&R, S60R manifold, TT-USB, Simota, IPD turbo back, IPD anti-roll bars & droplinks, IPD HT, MSD coil, Innovate LC-1, dimming mirror, Goodridge hoses, DOT5.1, V70 rear lights & handles, poly top bush & A arms & tie bar, strut brace, clear repeaters, 6k HID, catch tank, 2x rear brace

May 5th, 2009, 16:49	#3
norfolkboy Junior Member Last Online: Today 08:30 Join Date: May 2007 Location: norwich	What you are looking at there I think you'll find is the engine speed sensor. The vehicle speed sensor is further round the back of the box going down on 1996 model year. On earlier ones it is even further down the back towards the diff. Look at the Diagram in the 850 technical section under auto trans diagnosis-AW50-42LE

May 5th, 2009, 16:53	#4
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	Don't forget that not all AW50-42 gearboxes are the same. Apart from the difference with the speed sensor, the gear ratios are different between models. You need to match the Volvo part number.

May 5th, 2009, 16:55	#5
HULK 850 T-5 for sale Last Online: Oct 17th, 2009 22:57 Join Date: Jan 2009 Location: dunstable	oh right so its not the engine speed sensor hes on about its the vehicle speed sensor that changed in the 1995 models?

May 5th, 2009, 17:29	#8
HULK 850 T-5 for sale Last Online: Oct 17th, 2009 22:57 Join Date: Jan 2009 Location: dunstable	ok have just taken a pic of where the vehicle speed sensor would be on a later model and i can tell if there is one there or not as there is a black plastic thing that carries loads of wires going over the spot where it would be so cant tell if its under there. in the pic bellow ok so do i need to match the part no. on my gearbox as there are diferant ratios? this is totaly cofusing me now. started of thinking i just need an aw50-42le now its got all complicated. aaaaaaahhhhhhh what gearbox do i need??????????

May 5th, 2009, 17:52	#9
norfolkboy Junior Member Last Online: Today 08:30 Join Date: May 2007 Location: norwich	Basically the type of autotransmission is an AW50-42LE. You then have different final drive ratios depending upon the model of 850 it is fitted to. These are as follows B5252S (2435cc 10 valve) 2.74:1, B5204S (1984cc 20 valve) 3.16:1, B5254S ( 2435cc 20 valve) 2.74:1 and finally B5234T ( 2319cc 20 valve Turbo) 2.54:1. You really have to get a box from the same model as yours . Fit the wrong one and you will either have rapid acceleration and no top speed or rubbish acceleration but you would eventually get up to an extremely high top speed.

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