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Why is it the volvo fh12 460 drives low gear but doesnt want too go in high gear what could be the cause of the truck taking and driving low gear but not high gear

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There are lots of reasons this could be happening. First I would check that the engine is working properly. If the power output is low then the gears will not up. Has the vehicle been regularly serviced? Auto boxes can be severly affected by old / contaminated fluid. Some boxes have electrical solonoids that select the gears these can stop working or bad connections to them. I would check the connections and try replacing the transmition oil before seeking professional help for a possible transmition rebuild.

Posted on Mar 08, 2019

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Have you over heated it if so gear box needs work if not have you checked oil and not under or over filled i say you have burnt out valves less than you think gearbox expert only

Posted on Mar 08, 2019

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: truck shakes while driving

check your ujoints

Posted on Sep 06, 2008

  • 182 Answers

SOURCE: 96 toyota tacoma 4x4

If you have auto locking hubs then you need to see if you are getting good vacuum to the front axel and check for a blown fuse or bad accuater

Posted on Sep 11, 2008

  • 5 Answers

SOURCE: 1994 Volvo 850 2.4L Auto transmission

Clear your engine and transmission codes, its a small box in the pass side engine compartment right behind the headlight. Search "Bay 13 Volvo" and that has all the information to check and clear the codes. It also has a list of what the codes mean to help you.

Posted on Oct 11, 2008

  • 1 Answer

SOURCE: 1993 Chevy 1500 pickup 4-wheel drive

I replaced the malfunctioning “thermal actuator” with the “Warn” Vacuum actuator setup, it’s been working great for about 7 years now, simple install, if I remember correctly, it was about $150.
That’s what engages the front diff into 4wd.

Posted on Nov 25, 2008

  • 548 Answers

SOURCE: Headlights go out while driving

You need to check the headlight relay to see if it is still good. Parts store can tell you where it should be and what the part number is when you find it. A good shop will be able to test it. I have found that Volvo likes to play hide the relay under the dash so it's hard to say for sure where it will be.

Posted on Jan 25, 2009

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Related Questions:

1 Answer

1989 Toyota Camry automatic transmission starting off on high gear.Stalls on drive like pulling heavy loads.


It is quite likely to be a failed shift solenoid, causing inability to find low gears. There should be a trouble code stored, causing the O/D lamp to blink.

Nov 18, 2014 | 1989 Toyota Camry

1 Answer

Why won't 1989 Volvo 240 shift into high gear anymore?


Either the O/D solenoid or relay has gone bad. However if the light operates you may have to much wear in the main housing in the rear of the transmission causing the pressure to be low in the case a transmission replacement is in order.

Sep 17, 2014 | Volvo 240 Cars & Trucks

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My 1999 Volvo S80 is slipping between 2nd and 3rd gear. And sometimes when i pull off it revs high causing it to take off real slow.


Hate to be the bearer of bad news, but when your trans starts slipping, it is failing and will eventually not move the car at all-you need to drive it so that it doesn't slip, which means light on the gas, nursing it until you decide how to proceed. Make sure it is not low on fluid, since that'll hasten the ultimate failure-sorry, not a happy thing.

Jan 07, 2011 | 1999 Volvo S80

1 Answer

I want to know about the power and the winter buttons. I want to know in the snow if I need to use the four wheel drive high or the four wheel drive low. I have a 1998 Honda Passport 4x4 automatic...


Four wheel High is what you need to use in snow. It is similar to your regular driving experience but your speeds should not exceed 45-50 mph. Shift through your normal gears as necessary and drive with appropriate caution. Four wheel High should be used only as long as driving conditions warrant, using it otherwise can cause unnecessary wear on your transmission and drive-train as well as lower fuel economy.

Four wheel low is used for pulling out of a ditch if you are stuck, going through deep mud or rock crawling. Four wheel low will also cause your vehicle to lurch every time you press the gas pedal.

Nov 15, 2010 | 1998 Honda Passport

1 Answer

Car want drive uphill


It sounds like you have a Auto Gearbox problem and the trouble could be the forward pump is sticking alowing the pump to stay in high and not dropping down 1 or2 gears ..So take to Auto shop and get the pressure tested on forward band and pump assy.
Let me know how you get on ... Ron

Oct 20, 2009 | 1996 Volvo 850

1 Answer

1989 volvo not shifting into gear


The only fluid expansion tank I know of is for the cooling system,and if that is the case you my have a leak in the transmission cooler that is built into the radiator.

Nov 30, 2008 | 1989 Volvo 240

1 Answer

2000 Volvo S40


one unit that operates ratio changes and is connected to the engine is that vacuum operated actuator on the transmission
it is possible that that unit is failing , vacuum hose is leaking and that will cause ratio changes as the vacuum varies
run the fault codes to check for wiring problems or VSS or TCM problems as well

Mar 23, 2017 | 2001 Volvo S40

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