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DiscoWeb Bulletin Board » Message Archives » 2003 Archives - Discovery Technical » Archive through November 12, 2003 » Transmission upshifting too early, 'lugging', slight 'hiccups'?? « Previous Next »

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Jeff Johnson (Jefferson)
New Member
Username: Jefferson

Post Number: 10
Registered: 10-2003
Posted on Sunday, November 02, 2003 - 09:34 pm:   Edit Post Delete Post Print Post

Alright.

New U-joint at 43K. No more hellacious racket or earthquake-ish tremors at 35-40mph. BUT...

While in service, I had another 2K D2 as a loaner for the day. I'll be damned if it didn't seem quicker. ( I know, a misnomer with Disco's)It also seemed to drive smoother. (Which is more than likely the Goodyear tires, which everyone tells me will give you a wobbly ride)Moving on..

It seemed to hold the the gears longer, it wasn't in sport, I checked. Smoother and quicker-

From a stop, I step on the gas in mine and it seems to almost immediately swith gears, it stays in that gear unitl I hit precisely about 2K on the tach and about 40mph, then it upshifts to the next gear which sends the tach to about 1400K, which almost seems to bog the thing down, a faint vibration again reminiscent of the U-joint issues again. So I keep on the gas to work it through, and as it is getting back up in the revs there is alittle 'hiccup' every couple seconds, almost you are running out of gas. Noticed this alot going up hills in the mountains a few weeks again, now it seems to be happening on flat ground as well.

Lately, I keep seeing 'vehicle speed sensor' pop up in the forums, does this sound like a suspect here?

If not, how about anyone else regarding the shift patterns? Seems like the engine, which revs strong, is getting lugged by the gears shifting too soon.

I am trying to get all of these bugs worked out before I run out of warranty ya know?

Jeff
 

Phillip Perkinson (Rover4x4)
Senior Member
Username: Rover4x4

Post Number: 497
Registered: 02-2003
Posted on Sunday, November 02, 2003 - 09:43 pm:   Edit Post Delete Post Print Post

you got stock size tires or any other mods on your truck.. a number of varibles could be attributed to that.
 

Bill Howell (Billh13)
Member
Username: Billh13

Post Number: 237
Registered: 03-2003
Posted on Monday, November 03, 2003 - 08:29 am:   Edit Post Delete Post Print Post

Got to adjust the down shift cable on the throttle body. It will change the shift points some.
 

Jeff Johnson (Jefferson)
New Member
Username: Jefferson

Post Number: 11
Registered: 10-2003
Posted on Monday, November 03, 2003 - 09:40 am:   Edit Post Delete Post Print Post

I'm using stock tires (I think), GY 255-65-16's, no lift. The other truck I drove had Michelins. I have heard the GY's wear funny, make it wobbly, and I have had some issues with alignment and wheel wieghts.

I still insist that my truck leans 1" on the right front, dealer insists all D2's do this which not many on this board agree with, don't know if this makes it shimmy somewhat.

Throttle body eh? I will investigate, how about the hiccup? Sounds alot like some others' decription of speed sensor issues?

Grrr.

Jeff
 

Jordan Zadwick (Fade_to_black)
New Member
Username: Fade_to_black

Post Number: 11
Registered: 06-2003
Posted on Monday, November 03, 2003 - 03:19 pm:   Edit Post Delete Post Print Post

I have a 2K disco and mine lugs (like it is running out of gas) when I am excelerating to get onto the highway for example. I haven't had any problems offroad or around town, just seems to be when I get on the gas to get merge onto the highway.

Is this kinda of what yours is doing? I am also wondering what it is, but not too worried about it.
 

Todd Phenneger (Toddp)
Member
Username: Toddp

Post Number: 139
Registered: 10-2002
Posted on Tuesday, November 04, 2003 - 05:08 am:   Edit Post Delete Post Print Post

Again,
Check shifter cable. By the Throttle Body. Mine was showing the exact symptom described. On the freeway i couldnt get into 3rd gear to pass unloess I was going like 45mph. Normally I can downshift up to 75mph. A few turns on the adjuster screw (black knob) and it tightened it right up. Now I can downshift at 75mph again. ANd I can hold 1st gear untill 4700 RPM on a good day. 4500 RPM on a bad day.
l8r
Todd
 

Matt Anderson (Disco01)
New Member
Username: Disco01

Post Number: 27
Registered: 10-2003
Posted on Tuesday, November 04, 2003 - 09:57 am:   Edit Post Delete Post Print Post

I dont have time right now....but i will explain this later.....btw, D2 has electronic ...I dont think there is a cable for down shift, and no VSS like D1
 

Matt Anderson (Disco01)
New Member
Username: Disco01

Post Number: 28
Registered: 10-2003
Posted on Tuesday, November 04, 2003 - 02:12 pm:   Edit Post Delete Post Print Post

Ok, here is pretty much how this all works. The D2 has no speed sensor between the tcase and e-brake like the D1 has. As far as I know, there is no kickdown cable, as it is electronically controlled (why there is the sport mode). The trans is somewhat adaptive, meaning the shift pattern is stored in the computer and thus will vary from vehicle to vehicle, depending on how it has been driven. Theoretically, if you disconnected the battery of both your disco and the loaner for several hours to clear out codes and such they should shift the same. But, as they are each driven differently for say 150-200 miles the shifts will taylor to the driver. Mine has the kind of stumble you are talking about also, but it also jumps around a bit while cruising in sport mode (but the trans is not shifting). I think my fist step is going to be fluid and filter change as I am approaching 55K. Personally, I think the dealer flashing the latest software into the computer would solve all of the problem, but my dealer did not do this when I complained about the problem thus I dont really want to go ask them to do it. If anyone who knows more about the computer on the D2s or 99+Range Rovers thinks this could work chime in, at least that way we can all know whether or not this is a possible cure. Good luck with it.
 

Chris Browne (Chris_browne)
Senior Member
Username: Chris_browne

Post Number: 411
Registered: 02-2003
Posted on Tuesday, November 04, 2003 - 05:35 pm:   Edit Post Delete Post Print Post

I recently went through a hallacious time with a new 03 volvo xc70....it was jittery to drive, decided when it was going to kick down, unresponsive, went into neutral between gears from time to time....
So initial blame was bad transmission....well, two software upgrades later we have a GREAT car....probably 99% perfect if not 100%
Real eye opener for everyone let me tell you!
 

Trevor (Daredvl)
Member
Username: Daredvl

Post Number: 92
Registered: 03-2003
Posted on Wednesday, November 05, 2003 - 11:54 am:   Edit Post Delete Post Print Post

Never forget the computer.
What appeared to be idle and transmission problems on a *1988* Chevy Blazer turned out to be the prom going bad on the ECU.
Yes, a 1988!
 

Peter J. Kelly (Pjkbrit)
Member
Username: Pjkbrit

Post Number: 51
Registered: 05-2003
Posted on Thursday, November 06, 2003 - 08:43 am:   Edit Post Delete Post Print Post

Yep my 99 D2 does thios too....always hunting for the highest gear ... but my Sis in Law's 2000 D2 has higher shift presets and goes much better as a result....anyone know how to reprogram these suckers?
Pete
 

Chris Browne (Chris_browne)
Senior Member
Username: Chris_browne

Post Number: 416
Registered: 02-2003
Posted on Thursday, November 06, 2003 - 09:10 am:   Edit Post Delete Post Print Post

check with the dealer
 

Peter J. Kelly (Pjkbrit)
Member
Username: Pjkbrit

Post Number: 52
Registered: 05-2003
Posted on Thursday, November 06, 2003 - 11:44 am:   Edit Post Delete Post Print Post

Chris....I wouldn't trust the Dealer in Mount Kisco, New York to fix my 7 years old's bicycle...and I'm outta warranty. Guess I'm stuck manually using the shifter!
 

Matt Anderson (Disco01)
New Member
Username: Disco01

Post Number: 29
Registered: 10-2003
Posted on Thursday, November 06, 2003 - 12:59 pm:   Edit Post Delete Post Print Post

Hahahah........Peter, I feel your pain about the dealer. That is the same reason I have never pushed getting mine fixed. I just don't think they really know how to troubleshoot very well. For example, last week I drove a Freelander for four days because my power seat quit working and they could not figure out how to fix it. At least they did not charge me for it. (It had quit right before the warranty went out a month ago so they covered it under good will or something like that). Anyhow, I was looking over my maint. records and I was reading the parts used and a trans oil filter was not mentioned, or accounted for when looking at the charges. They used 6 qts of fluid, but I dont think that would be enough if changing the filter. What do yall think? I know have 53K and would say if it has never been done it would be about time to do it.
 

Matt Anderson (Disco01)
New Member
Username: Disco01

Post Number: 30
Registered: 10-2003
Posted on Thursday, November 06, 2003 - 01:01 pm:   Edit Post Delete Post Print Post

oops, I was talking about reciept from the 30K service

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