Mopar NSG 370 & BG Syncro Shift II

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Is there any benefit to mixing Mopar MS-9224 or Valvoline Synchromesh Manual Transmission Fluid mixed with BG Syncro Shift II Synthetic for a Jeep Wrangler JK using NSG 370 6 speed manual transmission, versus running straight BG Syncro Shift II Synthetic?

Purchased my Jeep JK new in 2013. One week ago I changed 6sd manual transmission fluid at 85,000 mile, using Valvoline SYNCHROMESH MANUAL TRANSMISSION FLUID.

I haven't been happy with gear 1 and 2 while using Mopar MS-9224 or Valvoline Synchromesh.
 
I've never heard of BG. I did'nt see a product data sheet on their site, either. Is it synchromesh? Does it meet the specs for the 370? If so, then maybe run it straight without mixing.

Have you tried Pennzoil Synchromesh? I'm currently running Valvoline in mine and it seemed a bit smoother than the Mopar, but it may just ben in my head.
 
Originally Posted by IndyFan
I've never heard of BG. I did'nt see a product data sheet on their site, either. Is it synchromesh? Does it meet the specs for the 370? If so, then maybe run it straight without mixing.

Have you tried Pennzoil Synchromesh? I'm currently running Valvoline in mine and it seemed a bit smoother than the Mopar, but it may just ben in my head.




I have not tried Pennzoil Synchromesh, but have considered trying it.

Here's a link to BG Syncro Shift II

BG Syncro Shift appears to be lighter than Mopar, Pennzoil, and Valvoline Synchromeshs. I copied the following from another thread on this forum.


Originally Posted by MolaKule

NOTE: This list is only a "suggested" list of MTFs. It is not an endorsement of any one fluid, nor is it implied that any one fluid will cure problems in MTs that have design problems or those that have excessive wear.

A. These MTL fluids are closest to a Kinematic Viscosity of 6.X cSt@100C (About the same viscosity as a Dexron VI) and SAE 70 or so:

1. Castrol Syntrans FE 75W,
2. BMW (Pentosin) MTF-LT-3,
3. Honda MTII or MTF 2.
4. Ford FML-XT-11-QDC
5. Volvo Manual Transmission Fluid (6.4 cSt) [Recommended for: type M65 5-speed with 6-cyl. engine, M66, MTX75 and MMT6 and of the type M56, M58 and M59 from and including model year 1996. Meets Ford specification WSSM2C200-D2]
6. Redline MT-LV SAE Viscosity Grade 70W/75W Vis 6.5cst@100°C


B. The next higher viscosity MTL would be the 7.0 to 7.6 cSt@100C versions (SAE 70W75) (About the same viscosity as the original DexronIII/Merc)

1. Royal Purple's Synchromax
2. Ravenol MTF-2
3. Honda MTF
4. VW part number G052512A2
5. GM Manual Transmission and Transfer Case Fluid
6. BMW (Pentosin MTF 2) MTF-LT-1, 2 ,3
7. Tutelo (Petronus, Italy, Product Code 1402)
8. Pentosin Pro Gear 70W75 (Australia)
9.0 Pentosin FFL-4
10. Redline Power Steering Fluid
11. RAVENOL STF


Note: C, D and E are often considered popularly as "synchromesh" fluids.


C. The next higher viscosity MTL group is in the 8.0 cSt to 8.9 cSt Range would be:

1. Castrol Syntrans V FE (8.0cSt)
2. Redline DCTF Dual Clutch Transmission Fluid (8.1 cSt)
3. BG Synchroshift II (8.2 cSt)
4. RAVENOL PSA (8.9 cSt)


D. The next higher viscosity MTL group in the 9.0 to 9.5 cSt range is (SAE 75W80):

1. Mopar Type MS-9417 MTL 9.0 cSt
2. Valvoline MTF Part Number 811095 9.2 cSt
3. Pennzoil Synchromesh 9.3 cSt
4. RAVENOL SSG 9.5 cSt


E. The next group of MTL's are in the 9.6 to 10.X cSt range (SAE 75W80):

1. Redline MTL 75W80
2. Amsoil MTF (9.7 cSt)
3. GM Synchromesh's
4. Volvo MTF 645
5. Fuchs TITAN SINTOFLUID SAE 75W-80 synthetic MTF (Carries a GL-5 rating as well)
6. Lodexol (Morris Lubricants) MTF
7. Motylgear 75W-80


F. The next higher viscosity MTL would be a 12.0cSt@100C and SAE 75W85:

1. Redline MT-85


G. The next higher viscosity MTLs in the 14-15 cSt (SAE 75W90) range would be:

1. Amsoil MTG
2. Redline MT-90
3. Castrol Syntrans Multivehicle 75W-90
4. Castrol Syntrans Transaxle 75w-90
5. Ford XT-75W90-QGT (Carries a GL-5 rating as well)
6. Ford MOTORCRAFT® Full Synthetic Manual Transmission Fluid XT-M5-QS
7. ACDelco 10-4059 GL-4 75W-90 Manual Transmission Fluid
8. RAVENOL TSG SAE 75W-90
9. LiquiMoly 75W-90 GL4
 
Originally Posted by IndyFan
How many miles on your Jeep?



A little over 85,600 miles. Bought it new in May 2013.
 
That BG is lighter, but it looks very close. I'd contact the company and ask if they recommend it for the NSG 370 and see what they say. Might be worth a try. If you give it a go, let us know how it feels.
 
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