Changing the transmission gear oil instructions - Smart Car Forums
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 10-02-2011, 02:43 PM
To the XCAPEPOD!
SCOA Club
 
rfernatt's Avatar
 
Join Date: Jan 2008
Location: Almost Heaven... West Virginia
Posts: 5,881
Thanks: 440
Thanked 1,724 Times in 846 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 31 Post(s)
Garage
Changing the transmission gear oil instructions

I decided to change the transmission gear oil in my smart fortwo (model 451). Although the factory fill is purported to be good for a lifetime of service, I figured it can’t hurt and may extend the life of the transmission by removing debris cast off during break-in. Following are the steps I used to change the gear oil. If you have other suggestions or notice that I've missed anything, please let me know so that these instructions can be updated.

Although I have provided some photos and step-by-step instructions, I want to acknowledge the smart owners that led the way by being the first to change the transmission oil, experimented with different brands of gear oil, tested the stock oil, and shared their experiences.

1. Ensure that you have the correct tools and supplies. You will need roughly 2.5 quarts of a GL-4 rated 75W-90 gear oil. I used RedLine MT-90 synthetic oil, but there are other quality choices available from various manufacturers. You will also need an 8mm Allen socket or wrench, a shallow pan to catch the old oil, and a funnel with a length of hose to refill. If you do not have an Allen socket (I didn’t) or a set of Allen wrenches that will work, you can purchase an inexpensive set with common sizes at Harbor Freight for less than $10 (Item #67891).



2. Although I had my car on ramps in these photos for other work, it is easy to access the transmission drain and fill plugs without ramps. If the car is on ramps, make sure you take it off the ramps onto a level surface before topping off or you will overfill the transmission (ask me how I know).

3. Using the 8mm Allen socket, remove the fill plug on the left side of the transmission housing (as viewed from the rear of the car). You will want to ensure that you can remove the fill plug before attempting to drain the gear oil.



4. Once the fill plug is out, position the drain pan on the floor under the drain plug on the lower right side of the transmission housing and remove the drain plug being careful not to drop it into the drain pan.



5. Once all the oil has drained, replace the drain plug and tighten with the 8mm Allen socket.

6. Lower the tailgate and remove the engine cover (see owner’s manual if you have questions) being careful not to misplace the twist bolt that secures the engine cover. I am using an intake hose in place of the stock resonator box, so there is a bit more room in my engine bay for the funnel. Lower the funnel with hose through the engine bay and put the end of the hose in the fill port. My funnel hose was only about 18" and it was barely adequate even with the greater clearance provided by the missing resonator. A longer length would be advisable, especially if you have the stock resonator. 30" should be plenty.

NOTE: If your 75W-90 oil bottles have a nipple top that will fit into the fill port, others have reported that the transmission can be refilled with oil directly without the need of a funnel/hose. The Redline bottles were not so equipped.




7. Ensure that the funnel is stable and proceed to slowly empty the quarts of gear oil into the funnel until gear oil begins to overflow from the fill port – roughly 2.5 quarts. As mentioned above, make sure you are on a level surface!

8. Once full, reinstall the fill plug with the 8mm Allen socket and clean up any excess oil around the fill or drain plugs with a rag.

9. Take the car for a test drive and recheck both plugs to make sure that there is no oil leaking from either.

10. Make a note of the date and the number of miles at which the transmission gear oil was changed for your records.

Last edited by rfernatt; 10-08-2011 at 09:49 PM.
rfernatt is offline  
The Following 19 Users Say Thank You to rfernatt For This Useful Post:
AndyT (01-17-2013), BB Benz (10-02-2011), chieftmc (10-03-2011), Hillclimber (10-03-2011), jefferios (10-24-2011), jetfuel (10-02-2011), jkjahobbs (10-23-2011), JohnnyBravo (04-04-2013), jwight (10-02-2011), MotorMike (07-13-2013), Roger Lair (05-11-2014), smark (10-02-2011), Smart Bob (10-02-2011), Smart Enuf (10-02-2011), smartcar111 (10-02-2011), smartGTdad (03-16-2013), srmack (10-04-2011), wahi (11-02-2012), wonderbo (10-08-2011)
Sponsored Links
Advertisement
 
#2 (permalink) Old 10-02-2011, 03:53 PM
ADOPT...Don't Shop!
SCOA Club
 
kheran's Avatar
 
Join Date: Dec 2008
Location: YO! JERSEY
Posts: 2,004
Thanks: 817
Thanked 836 Times in 466 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Garage
Very nice detailed post..............
I hope you don't anger the BOT 328 gods...........
kheran is offline  
#3 (permalink) Old 10-02-2011, 04:13 PM
55,000 smiles & counting!
SCOA Club
 
Neonspinnazz's Avatar
 
Join Date: Sep 2008
Location: NE Illinois
Posts: 13,603
Thanks: 5,097
Thanked 1,894 Times in 1,269 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 67 Post(s)
Garage
*Awaits Penske_smart_WCovina to tell you something about the all divine transmission*

Great write-up!
Neonspinnazz is offline  
The Following 2 Users Say Thank You to Neonspinnazz For This Useful Post:
smark (10-02-2011), smartcar111 (10-02-2011)
#4 (permalink) Old 10-02-2011, 06:39 PM
happy smarting (Mod emeritus)
SCOA Club
 
GetSmrt28277's Avatar
 
Join Date: Jul 2008
Location: smarting here & there
Posts: 5,288
Thanks: 181
Thanked 257 Times in 179 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Garage
Something else to do Saturday at the maintenence bash. Yeah!
now where is that gojo?
GetSmrt28277 is offline  
#5 (permalink) Old 10-02-2011, 06:45 PM
JOIN SCOA YOU'LL BE GLAD
SCOA Club
 
jetfuel's Avatar
 
Join Date: Sep 2008
Location: padded room #1
Posts: 8,430
Thanks: 734
Thanked 1,878 Times in 915 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 61 Post(s)
...just bring your low cut blouse and you will not need the Gojo...

jetfuel....thanks for the write up...
jetfuel is offline  
#6 (permalink) Old 10-02-2011, 06:46 PM
CT Chapter President
SCOA Club
 
smartcar111's Avatar
 
Join Date: May 2008
Location: Connecticut
Posts: 4,792
Thanks: 631
Thanked 504 Times in 304 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
I see rfernatt only uses the best of the best in his ride.

Excellent write-up! Tell us how you like the change!
smartcar111 is offline  
#7 (permalink) Old 10-02-2011, 06:51 PM
SCOA Club
 
forestacademy's Avatar
 
Join Date: Aug 2008
Location: Spry Whimsy Fiber Arts
Posts: 11,887
Thanks: 125
Thanked 769 Times in 476 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Garage
Does this work like this if you didn't change out the intake and still have a resonator box?



I know when by dealer did it he filled it from below with a tube and a hanger for the bottle he rigged like an I V on the lift
forestacademy is offline  
#8 (permalink) Old 10-02-2011, 06:54 PM
CT Chapter President
SCOA Club
 
smartcar111's Avatar
 
Join Date: May 2008
Location: Connecticut
Posts: 4,792
Thanks: 631
Thanked 504 Times in 304 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Peter, you just need to get a longer tube and maneuver said tube more towards the right of the engine compartment.
smartcar111 is offline  
#9 (permalink) Old 10-02-2011, 06:57 PM
Lifetime Member
SCOA Club
 
Kermit's Avatar
 
Join Date: Apr 2008
Location: Redneck Riviera - NWFLA
Posts: 11,307
Thanks: 1,533
Thanked 1,919 Times in 1,003 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Garage
I just stuck the bottle of gear oil in the fill hole but I had a little better access.
Kermit is offline  
#10 (permalink) Old 10-02-2011, 07:44 PM
To the XCAPEPOD!
SCOA Club
 
rfernatt's Avatar
 
Join Date: Jan 2008
Location: Almost Heaven... West Virginia
Posts: 5,881
Thanks: 440
Thanked 1,724 Times in 846 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 31 Post(s)
Garage
By the way, I collected a sample of the old oil for Blackstone testing and I'll post the results of that test when I receive them...
rfernatt is offline  
The Following 3 Users Say Thank You to rfernatt For This Useful Post:
smartcar111 (10-02-2011), SmartDigger (10-02-2011), wonderbo (10-08-2011)
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Smart Car Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


331

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



  Similar Threads
Thread Thread Starter Forum Replies Last Post
Torotrak’s new generation transmission is good gear BigWarpGuy The Car Lounge 4 09-04-2009 12:16 PM
Problem With Gear Transmission KIMTEH New Members Area 0 07-27-2008 10:20 AM
Strange 1st to 2nd gear transmission issue HotCookCpl smart General Discussion 1 05-09-2008 07:31 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On