Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

What weight of transmission gear oil is needed 1990 rd690s…

Customer Question
what weight of transmission gear...
what weight of transmission gear oil is needed for a 1990 rd690s mack truck with e6 300 hp engine
Submitted: 2 years ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 32 minutes by:
1/27/2016
Technician: Daniel Wilson,
 replied 2 years ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,890
Experience: Owner at DJ Wilson
Verified

Hi Ron, My name is***** will be glad to help What transmission is in your truck? Also check the color of the drain oil and for a tag whether synthetic is recommended, The Mack transmissions call for 75w 90 but 80w90 is perfectly fine to use. Click on this link for the specs.

Oils Mack

Ask Your Own Medium and Heavy Trucks Question
Technician: Daniel Wilson,
 replied 2 years ago

Hi, Did you get this resolved?

Ask Your Own Medium and Heavy Trucks Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Daniel Wilson Your Own Question
Daniel Wilson
Daniel Wilson
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,890
6,890 Satisfied Customers
Experience: Owner at DJ Wilson

Daniel Wilson is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

6,890 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

4,530 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,892 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,243 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician

cumminsdr

cumminsdr

Mechanic

1,351 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

991 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

dieseldan55

dieseldan55

Contractor

74 satisfied customers

Road Service mechanic for Volvo Construction.

< Previous | Next >

Related Medium and Heavy Trucks Questions
1990 Mack E6 613, we just replaced the head gaskets and had
1990 Mack E6 613, we just replaced the head gaskets and had a mechanic from Mack come a do a valve adjustment. We continued to put engine back together but, when we added antifreeze it started to leak… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,243 satisfied customers
I have a 1985 mack r model value liner and it has the alum
i have a 1985 mack r model value liner and it has the alum front main bolts to it and i have broke both sides of it where it bolts to the frame at different times did somebody ever make a after market… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,890 satisfied customers
Is a FRO 16210B compatable with a Mack MP8 engine set at 505
is a FRO 16210B compatable with a Mack MP8 engine set at 505 hp? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,890 satisfied customers
Need a diagram of fuse positions and what they are for..1998
need a diagram of fuse positions and what they are for..1998 Mack rd690 E-7 … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,243 satisfied customers
I workin on a e6 350 mack dinatard how do i adjust the
Hey i workin on a e6 350 mack dinatard how do i adjust the valves … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
I have a 99 mack stuck in gear. i took shifter out and look
i have a 99 mack stuck in gear. i took shifter out and look like the fork is good but the trans is still in gear … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,890 satisfied customers
When changing down the gearbox some how looses all gears for
When changing down the gearbox some how looses all gears for 5 to10 minutes, every thing feels like its changing but there is no drive. we have had the clutch, pressure plate, master cylinder, slave c… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
I saw the answer about the under powered Mack engines CH635
I saw the answer about the under powered Mack engines CH635 330-350 hp. I also have two of these trucks. I have deleted the egr coolers but did not help much. Presently these trucks have rear differen… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,890 satisfied customers
95 Mack no power to injectorv pump. Bypassed ran power t
95 Mack no power to injectorv pump. Bypassed ran power t fuel shut off unit starts but at 3500 rpm. Could fuel controller be bad. How can I be sure cost 2800… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,890 satisfied customers
I have a 96 mack Rd690 blowing oil out of the oil check tube.
I have a 96 mack Rd690 blowing oil out of the oil check tube. When I take the cap off the oil fill tube it blows out there too.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,530 satisfied customers
Have a 2001 MACK RD690, back up lights n alarm stopped working,
Have a 2001 MACK RD690, back up lights n alarm stopped working, not sure where reverse light switch is or what else to look for… read more
Jim
Jim
Diesel tech.
85 satisfied customers
Current truck Mack Quantum with 975.000 km with an Ea7 engine.
Current truck Mack Quantum with 975.000 km with an Ea7 engine. The truck uses about 1litre of oil every couple of thousand ks. What HP is this engine and how many more ks can i expect before running i… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
Which mechanical engine R Model Mack Truck?New venture:
Which mechanical engine R Model Mack Truck? New venture: I am looking to purchase a good, used daycab tractor to pull chip and/or log trailers in SE Virginia. I am really considering an '80s vintage R… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,530 satisfied customers
Hello, we are a water well drilling business located in southern
Hello, we are a water well drilling business located in southern New Jersey and are in the process of purchasing a new drill rig and have options on trucks. We will need a tanden full screw truck with… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
I have 2 Mack trucks model ch635 powered by 330/350 hp Mack
I have 2 Mack trucks model ch635 powered by 330/350 hp Mack engines. 2004 year model. These trucks suffer from lack of HP.What can we do to increase HP? Also can we by pass the egr cooler? Thanks for … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,890 satisfied customers
I have a 1964 B-61 Mack. I would like to replace the engine
I have a 1964 B-61 Mack. I would like to replace the engine and trans with a newer Maxidyne 300+ hp engine and a ( if possible ) 5 or 6 speed Allision Trans. THE Question: what years will fit and stil… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
MACK E6: Dear Sir. is turbocharger Garrett Airsearch P/N 631GC4101P19X,
Dear Sir. is turbocharger Garrett Airsearch P/N 631GC4101P19X, Serial NO. QBR 1548 R fit for MACK engine E6 300HP?. thanks for your answer.… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
I have a 1997 Mack CH613 with a 450 hp engine and a T2018 transmission.
I have a 1997 Mack CH613 with a 450 hp engine and a T2018 transmission. The range shifter is inoperable and stuck in HI. Does the fact that the range shifter is stuck in HI mean that I will be trying … read more
JANECZFJ
JANECZFJ
199 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x