Checking Transmission fluid level in 400 turbo - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HeavyHauler · 07-22-2023, 03:54 PM

Do you check the transmission fluid level in a Chevy TH400 turbo by checking it when the engine is warm and truck is idling in neutral?

**leddzepp** · 07-22-2023, 03:56 PM

Yes

**Steeveedee** · 07-22-2023, 05:18 PM

Also should be on reasonably level ground.

**kwmech** · 07-23-2023, 01:22 AM

Was working years ago with a trans shop and he always checked the level while in gear also. Dunno if it matters much. I was taught to check in neutral also

**70STOVEBOLT** · 07-24-2023, 11:25 AM

I believe it should be checked with the transmission in park, should say right on the dipstick.

**Stocker** · 07-24-2023, 04:08 PM

Neutral or park, I don't think it matters. I believe the only difference is the engagement (or not) of the parking pawl inside the transmission.

07-22-2023, 03:54 PM	#1
HeavyHauler Registered User Join Date: Nov 2011 Location: USA Posts: 401	Checking Transmission fluid level in 400 turbo Do you check the transmission fluid level in a Chevy TH400 turbo by checking it when the engine is warm and truck is idling in neutral?

07-22-2023, 03:56 PM	#2
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,022	Re: Checking Transmission fluid level in 400 turbo Yes __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul

07-22-2023, 05:18 PM	#3
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,610	Re: Checking Transmission fluid level in 400 turbo Also should be on reasonably level ground. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

07-23-2023, 01:22 AM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,602	Re: Checking Transmission fluid level in 400 turbo Was working years ago with a trans shop and he always checked the level while in gear also. Dunno if it matters much. I was taught to check in neutral also

07-24-2023, 11:25 AM	#5
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,367	Re: Checking Transmission fluid level in 400 turbo I believe it should be checked with the transmission in park, should say right on the dipstick. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

07-24-2023, 04:08 PM	#6
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,696	Re: Checking Transmission fluid level in 400 turbo Neutral or park, I don't think it matters. I believe the only difference is the engagement (or not) of the parking pawl inside the transmission. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay



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