TH400 dipstick

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

longbeach

Member
Joined
Nov 20, 2021
Posts
43
Reaction score
24
Location
Maine
First Name
Wayne
Truck Year
1986
Truck Model
K20
Engine Size
350
Proper length of dipstick for a 1986 TH400. Or, alternately depth of oil above bottom of pan or whatever the stick bottoms out on ?
 

Matt69olds

Full Access Member
Joined
Jan 8, 2018
Posts
2,338
Reaction score
3,569
Location
Central Indiana
First Name
Matt
Truck Year
81
Truck Model
GMC 1/2 ton
Engine Size
455 Olds
The full mark needs to be level with the pan rail. GM made a lot of different dipsticks and tubes for different applications, as long as your combination puts the full mark even with the pan rail you should be good. A deep pan would be even more forgiving of it’s not exactly right.
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,121
Reaction score
6,038
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
You must be registered for see images attach
 

longbeach

Member
Joined
Nov 20, 2021
Posts
43
Reaction score
24
Location
Maine
First Name
Wayne
Truck Year
1986
Truck Model
K20
Engine Size
350
Thanks for the replies. When I bought the truck a lot of things were replaced, not all correct. The tranny dipstick had no stop on the top. I put a grommet in to seal the tube but have been concerned about proper level..Thanks
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,121
Reaction score
6,038
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
Thanks for the replies. When I bought the truck a lot of things were replaced, not all correct. The tranny dipstick had no stop on the top. I put a grommet in to seal the tube but have been concerned about proper level..Thanks
what do you mean no stop?
 

Latest posts

Forum statistics

Threads
41,854
Posts
903,555
Members
33,366
Latest member
texdave
Top