Sorry for the late respone, there is nothing lit up on the instrument cluster...when i press the O/D buttom then it says O/D OFF on the instrument cluster and nothing else lit up. one other thing that i forget to mention is that the car stay or start to slow down when i try to go uphill at 65mph, i press the gas padel harder and harder but it don't go faster and start to drop down the mph. This car has a Salvage Title so i don't know if i dealer will help me out.... so far, i quess my problem is something electrical...i will bring to auto shop and ask them and see what happen....thank you

 

wow, yeah...if it is a salvage title...your warranty is non-existant.

now slowing down going up hill is pretty normal. now when you get to 83 mph, is it like the car won't upshift to the next gear or something? like it is only using the lower three gears? or it just gets to 83 mph in top gear and just stops at 83 mph?

 

Let's put it this way, if the tranny stays in 3rd it would see something very close to 5K @ 83 MPH, so something is not allowing the transmission to make the final shift.

Tom

 

time to call aamco, double a, mco for some tranny work.

 

it seem like its unable to ship to the final gear because 83mph is max that i can drive, doesn't matter how hard i hit the gas padel. my car is automatic..

 

I'm sure your MPG is suffering too then...

 

I agree... it's got to be something in your tranny.
Def time for some tranny work.

 

I can't tell from your post last night if the car ever makes it into OD. I don't think you ever said what RPM it's running at different speeds using the chart Tomas posted. It sounds like it's not going into OD, but....

If you're cruising along at 50 or so, and hit the OD off button, does it downshift, or stay in the same gear?
You might get somone local to you with an auto box to come take it for a spin to get a sense of what it's really doing too.

Any idea as to why it has a salvage title?

 

Hey Tom I don't yet have an xB but hopefully at the end of today that will be a different story... However, I was looking at the gear ratios and what not for the xB and did some sophisticated excel spreadsheet to calculate engine speed. I did it based on stock xB tires and I got different numbers than you for this...

In 5th gear I'm calculating 60 mph ~ 2880 RPM, 70 ~ 3360, 80 ~ 3840. It seems that I'm about 5mph over your speeds at the same RPM. I'm wondering if you are using a different tire size or if possibly my gear ratios are off...

1st: 3.545
2nd: 1.904
3rd: 1.310
4th: 0.969
5th: 0.815
Final: 4.16

Let me know if you have different information.

Jeff

PS - As for the xB stuck at 83MPH, I almost laughed my ___ off when someone said check for the floormat under the gas pedal. That is exactly what I was thinking. Anyhow, anything is possible with the salvaged title, good luck finding 84mph.

 

Jefe, here's the info I have:

====

880 * 4.15 * 0.70 = 2556.4 RPM
(rev per mile) * (final ratio) * (top gear ratio) = (engine RPM at 60MPH)

====

Just using the stock tire size, the differential ratio, and the top gear ratios of
the xB with manual or auto transmission I come out with these figures, plus
or minus maybe 10 RPM...

AUTOMATIC:

2560 RPM @ 60 MPH
2990 RPM @ 70 MPH
3410 RPM @ 80 MPH

MANUAL:

3070 RPM @ 60 MPH
3580 RPM @ 70 MPH
4090 RPM @ 80 MPH

====
This info dates back to when the xB was first introduced, but seems to match reasonably well with Real World™ experience (and are somewhat rounded off, of course). The final drive ratio is quite different between the auto and manual.

Tom

 

Thanks Tom...

I'll use your ratios... I see a 185/60/15 having a circumfrence of 74.58in ~ 850 revolutions... but are we gonna split hairs here dude? No matter the math, it is a sweet ride...

I had the final drive from the auto...

 

IM Really trying not to sound like a d*ck....but are you a BIG person....like 350# heavy. That might be part of the prob. same with my cousin and his miata...man weighs 375...that miata wont go faster then 75, and cant clear speedbumps.

 

Yeah, Jefe, the 880 revs/mile is based on the average tire of that size, not a brand new one, so the tread is about half way through it's wear range. I didn't spell out the compromises in the numbers, but they are, for the most part, fairly decent, I think.

Tom

 

I will be conducting big dude speed tests upon getting my xB. I will let you know.

6'7" 350lbs

DO WORK!

 

I dont know about that. I got mine up to 90 with five people in the car and ac on without trying. I could easily see doing 100 without any problem.

 

Yeah, I pile up to 900 lbs. of tile and stone sample boards and product, plus myself in my xB (please don't preach to me about GVWR, I know...) and don't really see much of a performance degradation.

Never had any reason to go much above 90 in mine, though.

I agree with the previous posts to try pushing the O/D button at about 50 or 60 to see if the car really is in fourth; doesn't sound like it!

John B.

 

I dont let anyone else in my car but me...call me overprotective of it....

 

No need to be a douche bag. And that map is wrong, half my family lives in the Dallas/Ft. Worth area and the speed limit is 75. I wouldn't know this if I didn't go down there every summer and get excited to drive legally at that speed.

 

I'm going to try to press the O/D at 50 to see what going on...but exactly what the car feels like when i do that ?? and also, do you guys think that it's okay to drive and not fix it, will it damage my transmission later on...for right now, everything work perfectly if i'm driving under 80mph....thanks

 

When shifting out of "overdrive" it should feel exactly like you just downshifted from
4th to 3rd. When shifting into "overdrive" it should feel exactly like you are shifting
from 3rd to 4th. Why? Because that is exactly what it is doing.

The will likely be a bit of delay in the upshift, but the downshift should be almost
immediate.

If the transmission doesn't shift like that, you are running around in third gear, which is
putting additional stress and wear on the engine (and sucking up extra fuel).

Tom