New Mystery tranny sound 96 D1 - Land Rovers Only

Adam in NYC USA · 01-19-2007, 04:37 PM

Hello from Adam in NYC.

I drive for 5 days a distance of 6 miles roundtrip.
Days off, I vary in trips from 60 miles to 350 miles roundtrip.

I have a mystery sound that has developed over the span of a week. Btw,I have a 1996 D1 with an automatic transmission.

I have developed a throbbing low frequency motorboat sound that occurs under acceleration (starting at 2000 rpm and 20 mph), also going uphill, and gets louder whenever I exceed 50 mph. Sound disappears when cruising, going level, and under deceleration.

Inspection of the tranny dipstick shows little and there is no burnt smell.. The tranny did Need a quart of ATF.

I am the 3rd owner of the D1, one with 114,600 miles and some towing in the past.

Anyone gotta a educated guess? Right now- it sounds like $2000 to me.

rovermech · 01-19-2007, 08:08 PM

Id check the u-joints.

Drillbit · 01-21-2007, 11:24 AM

I 2nd checking the joints, if they feel ok check the diffs, there shouldn't be more than an 1/8 to 1/4 inch play in them.

Marty

dent · 01-21-2007, 04:31 PM

i'd say the rubber donut between the drive shaft and the rear diff might be falling apart. mine when and i replace with a ujoint
sam

Adam in NYC USA · 02-02-2007, 06:59 PM

Quote:

Originally Posted by dent

i'd say the rubber donut between the drive shaft and the rear diff might be falling apart. mine when and i replace with a ujoint
sam

Had that replaced two years back/ so far the same/ time to do some OT for some tranny work.

Adam in NYC USA · 02-10-2007, 07:22 AM

Sometimes it is the little things that do it. Got rid of most of the noise. Will drive it some more to see if that really got rid of it.

Adam in NYC

Adam in NYC USA · 02-15-2007, 09:19 PM

Had some tires go flat in the frigid weather we are undergoing here in the Northeast. Had two tyres go flat on the left side. Had the tyres serviced and after the tyre guy did his business, the noise disappeared on the left side. Did the right side and the noise diminished greatly.

(Note: Read below, that was part of it).

Adam in NYC USA · 03-28-2007, 11:45 AM

Quote:

Originally Posted by dent

i'd say the rubber donut between the drive shaft and the rear diff might be falling apart. mine when and i replace with a ujoint
sam

You're right. The bolts looks like they are chewed on one side. The front noise turned out to be worn ball joints on the back bend tie rod next to the steering damper. The front has cost me about a bit , now to do the back flex-coupling, and I changed it just a few years back.

Huh. Thanks DAP, for the parts.

Adam in NYC

TerryS · 03-28-2007, 12:49 PM

Didn't sound like a xmission problem, and glad it turned out not to be. FWIW, if you ever do need transmission work, The Transmission Shop, in Coventry, Rhode Island, excellent on ZF boxes, gets about $1400 for a complete overhaul.

Adam in NYC USA · 03-30-2007, 06:43 AM

Hello from Adam in NYC

Got my D1 working in tip-top shape, thanks to DAP and Scott Dalton my mechanic.

Lifted the D1, and the UNI-FLEX on the rear driveshaft was ripped apart. I changed it about when I got the D1 (Summer 2004?) and I am puzzled how the Uni-flex just got ripped apart.

A better description is that the metal rings from one side rip themselves loose and let themselves crash to the opposing bolts from the joining shaft (Note to myself: that was the worst description that I can do but what the heck).

Noise gone and the acceleration is back when you are hitting the gas.

SO in toto, one bend tierod from some road debris I hit (maybe I should buy that armour cover for the tierods). The roto-flex noise was covered up by the squeaking in the front.

Life with a Rover. I am beginning to think that on-road here in NYC is worse than going off-road. You should see the potholes here in the pavement. They are killers.

Adam in NYC

If this happens again, I am going to install that driveshaft kit from DAP to replace that roto-flex.

Adam in NYC USA · 03-30-2007, 06:45 AM

Quote:

Originally Posted by TerryS

Didn't sound like a xmission problem, and glad it turned out not to be. FWIW, if you ever do need transmission work, The Transmission Shop, in Coventry, Rhode Island, excellent on ZF boxes, gets about $1400 for a complete overhaul.

One for the notebook.

onslow · 03-30-2007, 07:19 AM

Quote:

Originally Posted by Adam in NYC USA

One for the notebook.

Check the Viscous coupling is working as these will destoy the rubber wotsit if they are on the way out, 2 years is not the lifespan i would expect for the doughnut

Adam in NYC USA · 04-01-2007, 07:51 AM

Quote:

Originally Posted by onslow

Check the Viscous coupling is working as these will destoy the rubber wotsit if they are on the way out, 2 years is not the lifespan i would expect for the doughnut

"Viscous coupling problems. This unit apportions power between front and rear wheels … mounted in the middle of the rear propshaft, when faulty it may result in unusual rear tyre wear or IRD failure.

IRD (intermediate reduction drive) failure. This is the gearbox that supplies power to the rear wheels. This is often caused by the viscous coupling failing."

Buddy Lee · 04-01-2007, 12:08 PM

Quote:

Originally Posted by onslow

Check the Viscous coupling is working as these will destoy the rubber

where exactly is the VC on a DI? I didn't even realize DI's had one.

As for the life of the roto-flex if he's got a lift that would greatly reduce the life of the roto-flex because of the increased angle of the prop shaft.

roverpwr · 04-06-2007, 05:17 PM

I dont think D1's have a VC in them, its just an open differential in the transfer box till he locks it in with the lever, then its 50/50 even spilt front to back. The rear shaft on my 96 has no such item, just the parking brake drum on the back of the transfer box, ujoint, shaft then the rotoflex at the axle end. I am betting on the lift eating up the rotoflex due to the greater angularity of the prop shaft. Its time to save up for the DAP drive shaft kit Adam. Cheers Mike

01-19-2007, 04:37 PM	#1 (permalink)
Adam in NYC USA The Urban Motorist Join Date: Sep 2004 Location: New York City Posts: 977 Gallery: 0	New Mystery tranny sound 96 D1 Hello from Adam in NYC. I drive for 5 days a distance of 6 miles roundtrip. Days off, I vary in trips from 60 miles to 350 miles roundtrip. I have a mystery sound that has developed over the span of a week. Btw,I have a 1996 D1 with an automatic transmission. I have developed a throbbing low frequency motorboat sound that occurs under acceleration (starting at 2000 rpm and 20 mph), also going uphill, and gets louder whenever I exceed 50 mph. Sound disappears when cruising, going level, and under deceleration. Inspection of the tranny dipstick shows little and there is no burnt smell.. The tranny did Need a quart of ATF. I am the 3rd owner of the D1, one with 114,600 miles and some towing in the past. Anyone gotta a educated guess? Right now- it sounds like $2000 to me. __________________ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Owner of a 1996 Land Rover Discovery 1 in Beluga Black or the Dirt of the Day. Where we are going,we don't need roads. Nothing in education is so astonishing as the amount of ignorance it accumulates in the form of inert facts. ‘The Education of Henry Adams’ (1907) ch. 25

01-21-2007, 11:24 AM	#3 (permalink)
Drillbit Giver of Last Rights to Fallen Rovers Join Date: Dec 2006 Location: Kentucky Posts: 74 Gallery: 0	u joints I 2nd checking the joints, if they feel ok check the diffs, there shouldn't be more than an 1/8 to 1/4 inch play in them. Marty __________________ Giver of Last Rights to Fallen Rovers 270 576 7922

02-10-2007, 07:22 AM	#6 (permalink)
Adam in NYC USA The Urban Motorist Join Date: Sep 2004 Location: New York City Posts: 977 Gallery: 0	Problem resolved. Sometimes it is the little things that do it. Got rid of most of the noise. Will drive it some more to see if that really got rid of it. Adam in NYC __________________ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Owner of a 1996 Land Rover Discovery 1 in Beluga Black or the Dirt of the Day. Where we are going,we don't need roads. Nothing in education is so astonishing as the amount of ignorance it accumulates in the form of inert facts. ‘The Education of Henry Adams’ (1907) ch. 25

02-15-2007, 09:19 PM	#7 (permalink)
Adam in NYC USA The Urban Motorist Join Date: Sep 2004 Location: New York City Posts: 977 Gallery: 0	Noise from Rims and Lugnuts Loosened by Use and Extreme Cold Had some tires go flat in the frigid weather we are undergoing here in the Northeast. Had two tyres go flat on the left side. Had the tyres serviced and after the tyre guy did his business, the noise disappeared on the left side. Did the right side and the noise diminished greatly. (Note: Read below, that was part of it). __________________ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Owner of a 1996 Land Rover Discovery 1 in Beluga Black or the Dirt of the Day. Where we are going,we don't need roads. Nothing in education is so astonishing as the amount of ignorance it accumulates in the form of inert facts. ‘The Education of Henry Adams’ (1907) ch. 25 Last edited by Adam in NYC USA : 03-30-2007 at 06:46 AM.

03-30-2007, 06:43 AM	#10 (permalink)
Adam in NYC USA The Urban Motorist Join Date: Sep 2004 Location: New York City Posts: 977 Gallery: 0	SOLVED PROBLEM- TORN UNI_FLEX and Bend Tierod Hello from Adam in NYC Got my D1 working in tip-top shape, thanks to DAP and Scott Dalton my mechanic. Lifted the D1, and the UNI-FLEX on the rear driveshaft was ripped apart. I changed it about when I got the D1 (Summer 2004?) and I am puzzled how the Uni-flex just got ripped apart. A better description is that the metal rings from one side rip themselves loose and let themselves crash to the opposing bolts from the joining shaft (Note to myself: that was the worst description that I can do but what the heck). Noise gone and the acceleration is back when you are hitting the gas. SO in toto, one bend tierod from some road debris I hit (maybe I should buy that armour cover for the tierods). The roto-flex noise was covered up by the squeaking in the front. Life with a Rover. I am beginning to think that on-road here in NYC is worse than going off-road. You should see the potholes here in the pavement. They are killers. Adam in NYC If this happens again, I am going to install that driveshaft kit from DAP to replace that roto-flex. __________________ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Owner of a 1996 Land Rover Discovery 1 in Beluga Black or the Dirt of the Day. Where we are going,we don't need roads. Nothing in education is so astonishing as the amount of ignorance it accumulates in the form of inert facts. ‘The Education of Henry Adams’ (1907) ch. 25

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01-19-2007, 08:08 PM	#2 (permalink)
rovermech 96 Disco Join Date: Jan 2005 Location: Arkansas Posts: 83 Gallery: 0	Id check the u-joints.

01-21-2007, 04:31 PM	#4 (permalink)
dent beer drinking member Join Date: Aug 2004 Posts: 322 Gallery: 0	i'd say the rubber donut between the drive shaft and the rear diff might be falling apart. mine when and i replace with a ujoint sam

03-28-2007, 12:49 PM	#9 (permalink)
TerryS Moderator Join Date: Aug 2004 Location: Bloomfield, CT If I died today, I lived there all my life. Posts: 2,182 Gallery: 0	Didn't sound like a xmission problem, and glad it turned out not to be. FWIW, if you ever do need transmission work, The Transmission Shop, in Coventry, Rhode Island, excellent on ZF boxes, gets about $1400 for a complete overhaul.

04-06-2007, 05:17 PM	#15 (permalink)
roverpwr Home of "rover" the '96 Disco 1 Join Date: Oct 2005 Location: Erie PA, land of lots of snow! Posts: 107 Gallery: 0	I dont think D1's have a VC in them, its just an open differential in the transfer box till he locks it in with the lever, then its 50/50 even spilt front to back. The rear shaft on my 96 has no such item, just the parking brake drum on the back of the transfer box, ujoint, shaft then the rotoflex at the axle end. I am betting on the lift eating up the rotoflex due to the greater angularity of the prop shaft. Its time to save up for the DAP drive shaft kit Adam. Cheers Mike __________________ 1996 Discovery 1 SE7 White with tan leather Tinted windows Brush guards factory fog lights

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